All language subtitles for Hummingbirds Magic in the Air PBS Nature 2010 720p Bluray EN Sub

af Afrikaans
sq Albanian
am Amharic
ar Arabic
hy Armenian
az Azerbaijani
eu Basque
be Belarusian
bn Bengali
bs Bosnian
bg Bulgarian
ca Catalan
ceb Cebuano
ny Chichewa
zh-CN Chinese (Simplified)
zh-TW Chinese (Traditional)
co Corsican
hr Croatian
cs Czech
da Danish
nl Dutch Download
en English
eo Esperanto
et Estonian
tl Filipino
fi Finnish
fr French
fy Frisian
gl Galician
ka Georgian
de German
el Greek
gu Gujarati
ht Haitian Creole
ha Hausa
haw Hawaiian
iw Hebrew
hi Hindi
hmn Hmong
hu Hungarian
is Icelandic
ig Igbo
id Indonesian
ga Irish
it Italian
ja Japanese
jw Javanese
kn Kannada
kk Kazakh
km Khmer
ko Korean
ku Kurdish (Kurmanji)
ky Kyrgyz
lo Lao
la Latin
lv Latvian
lt Lithuanian
lb Luxembourgish
mk Macedonian
mg Malagasy
ms Malay
ml Malayalam
mt Maltese
mi Maori
mr Marathi
mn Mongolian
my Myanmar (Burmese)
ne Nepali
no Norwegian
ps Pashto
fa Persian
pl Polish
pt Portuguese
pa Punjabi
ro Romanian
ru Russian
sm Samoan
gd Scots Gaelic
sr Serbian
st Sesotho
sn Shona
sd Sindhi
si Sinhala
sk Slovak
sl Slovenian
so Somali
es Spanish
su Sundanese
sw Swahili
sv Swedish
tg Tajik
ta Tamil
te Telugu
th Thai
tr Turkish Download
uk Ukrainian
ur Urdu
uz Uzbek
vi Vietnamese
cy Welsh
xh Xhosa
yi Yiddish
yo Yoruba
zu Zulu
or Odia (Oriya)
rw Kinyarwanda
tk Turkmen
tt Tatar
ug Uyghur
Would you like to inspect the original subtitles? These are the user uploaded subtitles that are being translated: 1 00:00:00,000 --> 00:00:00,000 Subtitles downloaded from www.OpenSubtitles.org 2 00:00:04,860 --> 00:00:07,300 HUMMINGBIRDS ARE THE SMALLEST BIRDS 3 00:00:07,428 --> 00:00:09,963 ON THE PLANET... 4 00:00:10,032 --> 00:00:13,968 BUT THEY HAVE POWERS AND ABILITIES 5 00:00:14,037 --> 00:00:17,406 FAR BEYOND THOSE OF OTHER BIRDS. 6 00:00:20,177 --> 00:00:22,646 EVERYTHING ABOUT THEM IS AMAZING -- 7 00:00:22,713 --> 00:00:26,783 AND MYSTERIOUS... 8 00:00:26,853 --> 00:00:30,355 THE WAY THEY LOOK... 9 00:00:30,424 --> 00:00:33,559 THE WAY THEY FLY... 10 00:00:33,626 --> 00:00:37,663 THE WAY THEY'RE BUILT FOR SURVIVAL. 11 00:00:37,732 --> 00:00:43,403 HUMMINGBIRDS LIVE THEIR LIVES IN FAST-FORWARD, 12 00:00:43,472 --> 00:00:46,340 INHABITING A REALM 13 00:00:46,409 --> 00:00:48,177 THAT'S LARGELY INVISIBLE TO US. 14 00:00:50,246 --> 00:00:53,950 FINALLY WE HAVE THE TECHNOLOGY TO BREAK DOWN 15 00:00:54,019 --> 00:00:56,988 BARRIERS OF TIME AND SPACE... 16 00:00:57,056 --> 00:00:59,724 AND IT'S BECOMING CLEAR THAT 17 00:00:59,793 --> 00:01:03,295 HUMMINGBIRDS ARE EVEN MORE AMAZING 18 00:01:03,363 --> 00:01:05,131 THAN WE COULD HAVE GUESSED. 19 00:01:09,738 --> 00:01:12,239 ENTER THE WORLD OF THE HUMMINGBIRD, 20 00:01:12,308 --> 00:01:14,409 WHERE THERE'S MAGIC IN THE AIR. 21 00:01:46,670 --> 00:01:48,470 NATURE IS MADE POSSIBLE 22 00:01:48,472 --> 00:01:50,092 IN PART BY: 23 00:01:50,127 --> 00:01:52,607 CANON 24 00:01:52,659 --> 00:01:56,694 PROUD SPONSOR FOR 20 YEARS. 25 00:01:56,763 --> 00:01:59,297 AND BY CONTRIBUTIONS TO YOUR PBS STATION 26 00:01:59,366 --> 00:02:01,100 FROM VIEWERS LIKE YOU. 27 00:02:09,779 --> 00:02:14,415 Narrator (Abraham): THEY ARE THE MOST REMARKABLE THINGS ON TWO WINGS. 28 00:02:23,663 --> 00:02:26,297 HUMMINGBIRDS ARE INTRIGUING... 29 00:02:28,601 --> 00:02:31,570 ENCHANTING... 30 00:02:33,809 --> 00:02:36,443 UTTERLY CAPTIVATING. 31 00:02:46,224 --> 00:02:51,294 BUT THEY SELDOM PROVIDE US WITH MORE THAN A FLEETING GLIMPSE. 32 00:03:00,808 --> 00:03:05,278 NOW, AT LAST, WE'RE ABLE TO SLOW THEM DOWN 33 00:03:05,347 --> 00:03:08,315 AND GET UP CLOSE. 34 00:03:08,384 --> 00:03:10,418 AND AS WE EXPLORE THEIR UNIVERSE, 35 00:03:10,487 --> 00:03:12,889 WE DISCOVER SOMETHING NEW AT EVERY TURN. 36 00:03:17,695 --> 00:03:22,767 HUMMINGBIRDS LIVE ONLY IN THE AMERICAS, 37 00:03:22,835 --> 00:03:25,336 BUT WITH NEARLY 350 DIFFERENT SPECIES, 38 00:03:25,405 --> 00:03:27,840 THEY ARE DAZZLING IN THEIR DIVERSITY. 39 00:03:27,909 --> 00:03:31,744 THE SMALLEST OF ALL WARM-BLOODED CREATURES, 40 00:03:31,813 --> 00:03:35,282 THEY LIVE ON THE EDGE OF SURVIVAL. 41 00:03:39,923 --> 00:03:43,592 BUT THEY ARE EQUIPPED BY NATURE TO MEET THE CHALLENGE. 42 00:03:49,935 --> 00:03:54,371 PERHAPS THEIR GREATEST GIFT IS THEIR TALENT FOR FLIGHT. 43 00:04:08,758 --> 00:04:11,060 JUST WATCH HOW THIS HUMMINGBIRD, 44 00:04:11,129 --> 00:04:12,296 A SPECIES CALLED 45 00:04:12,363 --> 00:04:13,831 "THE MAGNIFICENT," 46 00:04:13,898 --> 00:04:16,599 STANDS ITS GROUND WHILE IT FEEDS -- 47 00:04:16,668 --> 00:04:20,503 EVEN IF THE FLOWER IS BLOWING IN THE WIND. 48 00:04:26,113 --> 00:04:27,948 WHAT IS THE SECRET OF 49 00:04:28,016 --> 00:04:32,353 THE HUMMINGBIRD'S AERIAL AGILITY? 50 00:04:38,162 --> 00:04:41,064 BIOLOGIST DOUG ALTSHULER 51 00:04:41,131 --> 00:04:43,233 WAS INTRIGUED BY THAT QUESTION, 52 00:04:43,301 --> 00:04:45,802 AND HE DECIDED TO INVESTIGATE. 53 00:04:45,872 --> 00:04:48,206 Altshuler: I HAVE TREMENDOUS RESPECT FOR HUMMINGBIRDS. 54 00:04:48,275 --> 00:04:49,875 THEY REALLY ARE, I THINK, SOME OF THE MOST 55 00:04:49,942 --> 00:04:51,709 ELITE ATHLETES IN THE ANIMAL WORLD. 56 00:04:54,748 --> 00:04:56,182 Abraham: HE HAS TURNED HIS LAB 57 00:04:56,251 --> 00:04:58,051 AT THE UNIVERSITY OF CALIFORNIA AT RIVERSIDE 58 00:04:58,119 --> 00:05:00,153 INTO A KIND OF HUMMINGBIRD TRAINING CENTER, 59 00:05:00,222 --> 00:05:03,291 WITH CUSTOM-DESIGNED WORKOUT STATIONS, 60 00:05:03,360 --> 00:05:05,960 WHERE HE CAN ASSESS THE LIMITS OF THEIR ABILITIES. 61 00:05:18,879 --> 00:05:21,147 TO TEST THEIR COORDINATION, 62 00:05:21,215 --> 00:05:25,150 HE USES A REVOLVING FEEDER FILLED WITH NECTAR -- 63 00:05:25,219 --> 00:05:27,320 THE HUMMER'S FAVORITE FOOD. 64 00:05:34,531 --> 00:05:37,433 MULTIPLE CAMERAS RECORD HOW THIS 65 00:05:37,501 --> 00:05:40,669 ANNA'S HUMMINGBIRD TWISTS AND TURNS, 66 00:05:40,738 --> 00:05:42,940 FINE-TUNING ITS POSITION SO IT CAN KEEP UP. 67 00:05:43,008 --> 00:05:44,842 Altshuler: ONE OF THE THINGS 68 00:05:44,910 --> 00:05:47,378 WE'VE BEEN QUITE SURPRISED TO LEARN 69 00:05:47,447 --> 00:05:49,748 IS THAT IF WE LOOK AT ALL OF THESE BEHAVIORS, 70 00:05:49,817 --> 00:05:52,252 WE SEE THAT THERE'S ACTUALLY A VERY RESTRICTED SET 71 00:05:52,320 --> 00:05:53,820 OF SMALL TYPES OF MANEUVERS. 72 00:06:01,998 --> 00:06:05,533 Abraham: FROM A LIMITED REPERTOIRE OF MOVES, 73 00:06:05,602 --> 00:06:07,803 THE HUMMINGBIRD CONSTRUCTS A DANCE 74 00:06:07,872 --> 00:06:10,039 OF INCREDIBLE GRACE AND PRECISION. 75 00:06:10,108 --> 00:06:12,109 Altshuler: YOU COULD ALMOST THINK OF IT LIKE THE MOVES 76 00:06:12,177 --> 00:06:13,610 THAT A BALLERINA MAKES -- 77 00:06:13,679 --> 00:06:17,148 SHE MIGHT MAKE A PIROUETTE. 78 00:06:17,217 --> 00:06:19,418 AND SHE MIGHT MAKE OTHER SPECIFIC MOVES. 79 00:06:19,486 --> 00:06:21,354 AND, FROM THOSE, CONSTRUCT A MORE COMPLEX 80 00:06:21,422 --> 00:06:22,856 AND INTRICATE DANCE. 81 00:06:22,923 --> 00:06:27,693 AND THAT'S REALLY WHAT WE SEE THAT THE HUMMINGBIRDS ARE DOING. 82 00:06:35,539 --> 00:06:38,674 Abraham: THE CHOREOGRAPHY OF THESE TINY DANCERS 83 00:06:38,743 --> 00:06:41,645 REVOLVES AROUND ONE TALENT IN PARTICULAR -- 84 00:06:41,714 --> 00:06:46,183 THEY CAN HOVER. 85 00:06:53,428 --> 00:06:57,931 THAT'S WHY HUMMINGBIRDS SEEM SO PERFECTLY BALANCED IN MID-AIR, 86 00:06:58,001 --> 00:07:01,336 AS IF THEY WERE FLOATING, RATHER THAN FLYING. 87 00:07:05,843 --> 00:07:10,213 THEIR WINGS ARE UNLIKE THOSE OF ANY OTHER BIRDS. 88 00:07:10,282 --> 00:07:12,116 WITH THEIR FLEXIBLE SHOULDERS 89 00:07:12,185 --> 00:07:15,086 THEY CAN EVEN MOVE THEM IN A FIGURE EIGHT -- 90 00:07:15,155 --> 00:07:18,623 AND THEY GAIN LIFT FROM BOTH SIDES. 91 00:07:18,692 --> 00:07:20,660 Altshuler: HUMMINGBIRDS ARE QUITE IMPRESSIVE 92 00:07:20,727 --> 00:07:22,695 IN THE FLIGHT BEHAVIORS THAT THEY ENGAGE IN. 93 00:07:22,764 --> 00:07:26,500 AND THIS INCLUDES MANEUVERING AND REALLY THE ABILITY TO DO 94 00:07:26,569 --> 00:07:30,438 SORT-OF UNUSUAL BEHAVIORS SUCH AS FLYING BACKWARDS, 95 00:07:30,506 --> 00:07:33,075 TURNING ON A DIME, 96 00:07:33,143 --> 00:07:36,712 AND EVEN BRIEFLY FLYING UPSIDE DOWN. 97 00:07:36,781 --> 00:07:38,982 ALL OF THESE BEHAVIORS, 98 00:07:39,051 --> 00:07:41,586 REALLY, ARE RELATED TO THEIR ABILITY TO HOVER. 99 00:07:50,864 --> 00:07:53,467 Abraham: THE HOVERING SKILL OF THE HUMMINGBIRD 100 00:07:53,535 --> 00:07:55,136 IS UNIQUE IN THE AVIAN WORLD. 101 00:07:58,609 --> 00:08:01,877 ONLY INSECTS CAN FLY LIKE THAT. 102 00:08:01,946 --> 00:08:05,248 THE HUMMINGBIRDS' ABILITY TO HOVER 103 00:08:05,317 --> 00:08:07,985 EVOLVED FOR A SIMPLE REASON -- 104 00:08:08,052 --> 00:08:12,055 IT ENABLES THEM TO DINE ON NECTAR. 105 00:08:23,239 --> 00:08:25,740 SINCE MOST FLOWERS DON'T OFFER A PLACE TO PERCH, 106 00:08:25,808 --> 00:08:29,178 HOVERING IS THEIR ONLY ALTERNATIVE. 107 00:08:32,217 --> 00:08:33,651 THIS UNUSUAL DIET 108 00:08:33,718 --> 00:08:35,985 HAS FORGED AN EVOLUTIONARY BOND 109 00:08:36,054 --> 00:08:38,789 BETWEEN HUMMINGBIRDS AND FLOWERS. 110 00:08:55,912 --> 00:08:57,946 IN THE MOUNTAIN FORESTS OF ECUADOR, 111 00:08:58,014 --> 00:09:00,749 THERE LIVES A HUMMINGBIRD THAT GOES TO GREAT LENGTHS 112 00:09:00,818 --> 00:09:02,386 IN ORDER TO FEED. 113 00:09:12,432 --> 00:09:15,267 THE SWORDBILL LIVES UP TO ITS NAME. 114 00:09:15,336 --> 00:09:22,441 ITS 4-INCH BILL IS ACTUALLY LONGER THAN ITS BODY. 115 00:09:22,511 --> 00:09:25,646 IT'S EASY TO SEE WHY... 116 00:09:25,715 --> 00:09:27,982 WHEN YOU LOOK AT THE FLOWER ON WHICH IT FEEDS. 117 00:09:32,524 --> 00:09:35,259 THE TRUMPET-LIKE BLOSSOMS OF THE DATURA 118 00:09:35,328 --> 00:09:37,696 HANG STRAIGHT DOWN. 119 00:09:37,764 --> 00:09:41,633 AND ITS NECTAR IS TUCKED AWAY AT THE VERY TOP. 120 00:09:52,415 --> 00:09:54,949 BECAUSE THE NECTAR IS SO HARD TO REACH, 121 00:09:55,017 --> 00:09:59,455 ONLY THOSE WITH THE RIGHT EQUIPMENT CAN GAIN ACCESS. 122 00:10:05,898 --> 00:10:08,967 OVER TIME, THE BLOSSOMS HAVE GROWN LONGER, 123 00:10:09,035 --> 00:10:11,936 AND SWORDBILLS HAVE EVOLVED TO KEEP UP. 124 00:10:14,476 --> 00:10:18,145 THE DATURA HAS AN ULTERIOR MOTIVE -- 125 00:10:18,213 --> 00:10:22,284 IT'S BRIBING THE SWORDBILL TO GAIN ITS HELP 126 00:10:22,352 --> 00:10:24,287 IN REPRODUCTION. 127 00:10:27,223 --> 00:10:30,959 AS THE BIRD FEEDS, IT'S DUSTED WITH POLLEN -- 128 00:10:31,029 --> 00:10:34,465 WHICH IT CARRIES TO THE NEXT BLOSSOM. 129 00:10:34,534 --> 00:10:41,039 THE SWORDBILL HAS BECOME A DATURA SPECIALIST, 130 00:10:41,109 --> 00:10:43,576 AND THAT MAKES IT THE PERFECT POLLINATOR. 131 00:10:43,644 --> 00:10:47,847 THIS MAY BE THE ULTIMATE IN "FLOWER POWER" -- 132 00:10:47,917 --> 00:10:51,886 A PLANT REMAKING A BIRD TO DO ITS BIDDING. 133 00:11:01,334 --> 00:11:06,237 THE DATURA IS FAR FROM UNIQUE. 134 00:11:06,306 --> 00:11:10,376 SOME 8,000 PLANT SPECIES THROUGHOUT THE AMERICAS 135 00:11:10,445 --> 00:11:14,380 DEPEND ON HUMMINGBIRDS ALONE FOR POLLINATION. 136 00:11:14,449 --> 00:11:20,721 THEIR WIDE RANGE OF FLOWER SHAPES HAS CO-EVOLVED 137 00:11:20,790 --> 00:11:22,224 WITH HUMMINGBIRD POLLINATORS 138 00:11:22,292 --> 00:11:24,327 TO PRODUCE AN INFINITE VARIETY OF LONG BILLS, 139 00:11:24,395 --> 00:11:26,429 SHORT BILLS, 140 00:11:26,498 --> 00:11:28,432 AND CURVED BILLS -- 141 00:11:28,501 --> 00:11:33,003 ALL DESIGNED TO FIT THEIR FAVORITE BLOSSOMS, 142 00:11:33,072 --> 00:11:35,273 LIKE A KEY IN A LOCK. 143 00:12:16,092 --> 00:12:17,927 BUT CO-EVOLUTION ALONE 144 00:12:17,994 --> 00:12:23,565 CANNOT EXPLAIN THE BIZARRE CASE OF THE PURPLE-THROATED CARIB. 145 00:12:23,635 --> 00:12:25,836 IT'S A MYSTERY THAT UNFOLDS 146 00:12:25,904 --> 00:12:29,372 ON THE TINY CARIBBEAN ISLAND OF DOMINICA. 147 00:12:33,013 --> 00:12:35,981 LUSH RAIN FORESTS COVER THE MOUNTAINS 148 00:12:36,049 --> 00:12:37,950 OF THE ISLAND'S INTERIOR. 149 00:12:41,590 --> 00:12:44,859 THEY'RE HOME TO SPECTACULAR FLOWERING PLANTS, 150 00:12:44,928 --> 00:12:48,263 AND TO HUMMINGBIRDS THAT HARVEST THEIR NECTAR. 151 00:12:51,569 --> 00:12:53,402 THAT INCLUDES TWO HUMMERS 152 00:12:53,472 --> 00:12:56,474 WHOSE BILLS HAVE VERY DIFFERENT SHAPES. 153 00:12:56,541 --> 00:12:58,375 AND HERE'S THE TWIST -- 154 00:12:58,444 --> 00:13:01,913 THESE TWO BIRDS BELONG TO THE SAME SPECIES. 155 00:13:01,982 --> 00:13:04,750 THEY ARE BOTH PURPLE-THROATED CARIBS -- 156 00:13:04,819 --> 00:13:08,320 THE MALE ON THE LEFT, THE FEMALE ON THE RIGHT. 157 00:13:08,389 --> 00:13:12,526 THE QUESTION IS, 158 00:13:12,595 --> 00:13:14,762 WHY DID THIS SPECIES END UP WITH 159 00:13:14,831 --> 00:13:17,399 SUCH DRAMATIC GENDER DIFFERENCES? 160 00:13:21,373 --> 00:13:22,873 BIOLOGIST ETHAN TEMELES 161 00:13:22,940 --> 00:13:26,776 KNEW THAT THE BEST PLACE TO LOOK FOR THE ANSWER 162 00:13:26,845 --> 00:13:29,647 WAS IN THE FLOWERS. 163 00:13:29,716 --> 00:13:34,252 MALE AND FEMALE CARIBS BOTH FEED ON HELICONIAS, 164 00:13:34,322 --> 00:13:36,456 WHICH HAVE VERY COMPLICATED BLOSSOMS 165 00:13:36,525 --> 00:13:38,591 HIDDEN WITHIN BIG MODIFIED LEAVES. 166 00:13:38,660 --> 00:13:42,295 I'LL CUT THIS AWAY FOR YOU HERE. 167 00:13:42,364 --> 00:13:45,066 YOU CAN SEE THE FRESH FLOWER PEEKING OUT RIGHT THERE. 168 00:13:47,839 --> 00:13:49,673 THIS LITTLE THING, I'M LIFTING IT UP RIGHT HERE. 169 00:13:49,741 --> 00:13:51,942 OKAY, THAT'S CALLED THE STAMINODE. 170 00:13:52,011 --> 00:13:54,178 AND IT BLOCKS THE NECTAR CHAMBER. 171 00:13:54,246 --> 00:13:56,847 SO WHEN THE BIRD FEEDS, IT ACTUALLY 172 00:13:56,916 --> 00:13:58,917 STICKS ITS BEAK IN ALL ALONG HERE, 173 00:13:58,985 --> 00:14:02,087 AND THEN ITS TONGUE WILL GO BACK INTO THE NECTAR CHAMBER 174 00:14:02,156 --> 00:14:04,057 AS IT FEEDS ON THE NECTAR. 175 00:14:04,124 --> 00:14:06,826 Abraham: THERE ARE SEVERAL VARIETIES 176 00:14:06,895 --> 00:14:09,363 OF THE HELICONIA ON THIS ISLAND. 177 00:14:09,432 --> 00:14:11,365 AND THE MALES AND FEMALES 178 00:14:11,434 --> 00:14:14,870 HAVE EVOLVED TO FEED ON DIFFERENT ONES. 179 00:14:14,939 --> 00:14:17,774 Temeles: THIS IS A MALE PURPLE-THROATED CARIB. 180 00:14:17,841 --> 00:14:20,342 THE BILL IS SHORT AND STRAIGHT. 181 00:14:20,411 --> 00:14:21,845 THERE GOES HIS TONGUE. 182 00:14:21,914 --> 00:14:25,450 A FEMALE BEAK IS ABOUT THAT MUCH LONGER, 183 00:14:25,518 --> 00:14:28,286 AND MUCH MORE CURVED. 184 00:14:28,354 --> 00:14:30,756 Abraham: THE FEMALE FEEDS ON 185 00:14:30,824 --> 00:14:34,093 THE VARIETY CALLED HELICONIA BIHAI, 186 00:14:34,161 --> 00:14:40,968 WHOSE LONG, CURVED FLOWER PERFECTLY MATCHES HER BILL. 187 00:14:41,037 --> 00:14:45,272 THE MALE PREFERS A DIFFERENT KIND -- 188 00:14:45,342 --> 00:14:47,577 HELICONIA CARRIBAEA. 189 00:14:47,645 --> 00:14:49,946 NOT ONLY DOES ITS SHORT, STRAIGHT FLOWER 190 00:14:50,015 --> 00:14:52,049 HAVE THE RIGHT SHAPE FOR HIS BILL, 191 00:14:52,118 --> 00:14:54,886 IT'S ALSO EXTREMELY RICH IN NECTAR. 192 00:14:54,954 --> 00:14:57,823 IN FACT, IT HAS ABOUT 50 TIMES MORE NECTAR 193 00:14:57,891 --> 00:15:00,425 THAN A TYPICAL HUMMINGBIRD FLOWER. 194 00:15:00,494 --> 00:15:05,031 THE MALE CARIB IS BIGGER THAN THE FEMALE, 195 00:15:05,100 --> 00:15:08,035 SO HE HAS THE WILL AND THE MEANS TO DEFEND HIS TREASURE 196 00:15:08,104 --> 00:15:09,537 AGAINST ANY COMPETITORS. 197 00:15:23,990 --> 00:15:25,590 TEMELES BELIEVES THAT 198 00:15:25,659 --> 00:15:28,393 WHEN THE ANCESTORS OF MODERN CARIBS 199 00:15:28,462 --> 00:15:30,030 FIRST COLONIZED THE ISLAND, 200 00:15:30,098 --> 00:15:33,299 THE AGGRESSIVE MALES STAKED OUT THE RICHEST FOOD SOURCE, 201 00:15:33,368 --> 00:15:34,835 AND NEVER LET IT GO. 202 00:15:34,903 --> 00:15:38,605 Temeles: MALES CLAIMED THE MOST REWARDING HELICONIA, 203 00:15:38,675 --> 00:15:40,809 THE FEMALES WERE LEFT WITH THE LESS REWARDING, 204 00:15:40,878 --> 00:15:42,879 AND THEN OVER TIME THE BILLS OF THESE BIRDS 205 00:15:42,947 --> 00:15:47,817 EVOLVED AND ADAPTED TO THE TWO SPECIES OF HELICONIA. 206 00:15:47,886 --> 00:15:51,855 Abraham: THIS ODD EVOLUTIONARY CHAIN OF EVENTS 207 00:15:51,924 --> 00:15:56,027 WAS PREDICTED BY NONE OTHER THAN CHARLES DARWIN. 208 00:16:01,603 --> 00:16:02,736 BACK IN THE 1870's 209 00:16:02,804 --> 00:16:05,338 HE THEORIZED THAT SEPARATE FOOD SOURCES 210 00:16:05,407 --> 00:16:07,742 COULD PRODUCE DIFFERENT BILL SHAPES 211 00:16:07,811 --> 00:16:09,377 IN MALE AND FEMALE BIRDS. 212 00:16:09,445 --> 00:16:14,616 IT TURNS OUT DARWIN WAS RIGHT -- 213 00:16:14,686 --> 00:16:18,322 AND THE CARIBS ARE LIVING PROOF. 214 00:16:42,186 --> 00:16:45,989 ALTHOUGH HUMMINGBIRDS ARE BUILT TO FEED ON NECTAR, 215 00:16:46,058 --> 00:16:48,760 THEY CANNOT LIVE BY NECTAR ALONE. 216 00:16:52,766 --> 00:16:55,200 IT DOESN'T PROVIDE ANY PROTEIN. 217 00:16:55,269 --> 00:16:59,105 SO HOW DO THEY FILL OUT THEIR DIET? 218 00:16:59,174 --> 00:17:01,341 SURPRISINGLY, THESE CREATURES 219 00:17:01,410 --> 00:17:04,279 THAT APPEAR SO DELICATE AND PEACEFUL 220 00:17:04,347 --> 00:17:06,682 ARE ACTUALLY AGGRESSIVE HUNTERS. 221 00:17:06,750 --> 00:17:10,385 THEY PREY ON INSECTS, 222 00:17:10,453 --> 00:17:13,455 WHICH CAN MAKE UP MORE THAN A QUARTER OF THEIR DAILY DIET. 223 00:17:13,524 --> 00:17:18,128 AND THEY COME BY THEIR TASTE FOR BUGS QUITE NATURALLY. 224 00:17:18,198 --> 00:17:23,567 HUMMINGBIRDS ARE EVOLUTIONARY COUSINS OF SWIFTS -- 225 00:17:23,636 --> 00:17:26,438 SPEEDY LITTLE BIRDS WITH SHORT BILLS, 226 00:17:26,507 --> 00:17:28,641 WHICH LIVE MAINLY ON INSECTS. 227 00:17:31,848 --> 00:17:35,984 AND, LIKE SWIFTS, HUMMINGBIRDS ARE EXPERTS AT AERIAL PREDATION. 228 00:17:39,990 --> 00:17:41,557 BUT SCIENTISTS 229 00:17:41,626 --> 00:17:44,394 HAD NEVER REALLY FIGURED OUT HOW HUMMINGBIRDS -- 230 00:17:44,462 --> 00:17:47,198 WHOSE BILLS ARE DESIGNED TO FEED ON FLOWERS -- 231 00:17:47,266 --> 00:17:50,202 MANAGE TO CATCH INSECTS WITH SUCH DEADLY ACCURACY. 232 00:17:53,875 --> 00:17:57,643 BIOLOGIST GREGOR YANEGA WAS IMPRESSED BY THE BIRDS' SKILL -- 233 00:17:57,712 --> 00:18:00,747 BUT STUDYING THEIR TECHNIQUE WOULD NOT BE EASY. 234 00:18:00,816 --> 00:18:02,416 Yanega: IT'S HARD TO SEE. 235 00:18:02,485 --> 00:18:05,420 THEY ARE VERY SMALL AND IT HAPPENS VERY FAST. 236 00:18:05,489 --> 00:18:07,357 AND, FOR THAT REASON, WE REALLY DO NEED TO USE 237 00:18:07,424 --> 00:18:09,359 SOME SORT OF TECHNOLOGY, LIKE HIGH-SPEED VIDEO, 238 00:18:09,427 --> 00:18:10,828 TO GET A LOOK AT WHAT'S GOING ON. 239 00:18:10,895 --> 00:18:14,297 Abraham: TO EXAMINE THEIR METHODS, YANEGA CONSTRUCTED 240 00:18:14,366 --> 00:18:16,667 A MORE CONFINED HUNTING GROUND. 241 00:18:16,736 --> 00:18:18,770 IT'S BASICALLY A BIG FISH TANK 242 00:18:18,838 --> 00:18:20,672 STOCKED WITH A LOT OF FRUIT FLIES 243 00:18:20,741 --> 00:18:24,710 AND ONE HUNGRY ANNA'S HUMMINGBIRD. 244 00:18:29,185 --> 00:18:30,618 YOU MIGHT EXPECT THAT 245 00:18:30,686 --> 00:18:32,220 THE HUMMER WOULD USE HIS LONG BILL 246 00:18:32,288 --> 00:18:33,955 LIKE TWEEZERS OR CHOPSTICKS 247 00:18:34,024 --> 00:18:36,558 TO SNATCH INSECTS OUT OF THE AIR. 248 00:18:36,627 --> 00:18:38,929 THAT WOULD BE QUITE A FEAT. 249 00:18:38,997 --> 00:18:41,231 Yanega: IF OUR LIPS AND JAWS COULD EXTEND IN FRONT OF US 250 00:18:41,300 --> 00:18:42,767 APPROXIMATELY FOUR FEET IN LENGTH, 251 00:18:42,835 --> 00:18:44,602 YOU KNOW, THEN IMAGINE TRYING TO, 252 00:18:44,669 --> 00:18:46,504 YOU KNOW, GRAB YOUR NEAREST ORANGE 253 00:18:46,572 --> 00:18:49,074 OR SOMETHING, WITH JAWS THAT ARE FOUR FEET LONG. 254 00:18:49,142 --> 00:18:50,709 Abraham: SLOW MOTION REVEALS 255 00:18:50,778 --> 00:18:53,213 JUST HOW THE HUMMINGBIRD MAKES THE KILL. 256 00:19:07,198 --> 00:19:08,598 OH, THAT'S A GOOD ONE! 257 00:19:08,666 --> 00:19:11,835 Abraham: RATHER THAN USING THE TIPS OF HIS BILL 258 00:19:11,904 --> 00:19:14,639 LIKE CHOPSTICKS, THE HUMMER OPENS WIDE -- 259 00:19:14,707 --> 00:19:18,343 AND THE FLIES NEVER STAND A CHANCE. 260 00:19:18,412 --> 00:19:20,947 Yanega: HE'S NOT GOING ALONG WITH THE CHOPSTICK MODEL OF, 261 00:19:21,015 --> 00:19:23,050 "I'M GOING TO PICK EVERYTHING OFF WITH THIS LONG BEAK," 262 00:19:23,117 --> 00:19:24,451 AND ONLY USE THE TIP OF THE BEAK. 263 00:19:24,519 --> 00:19:26,187 HE'S USING, REALLY, THE BASE OF THE BEAK 264 00:19:26,255 --> 00:19:28,122 AND TRYING TO USE THE FATTEST PART OF HIS JAWS 265 00:19:28,191 --> 00:19:30,059 TO CATCH THE FLIES. 266 00:19:30,126 --> 00:19:32,626 Abraham: THE HUMMER'S LOWER BILL CAACTUALLY BEND 267 00:19:32,695 --> 00:19:36,165 IN THE MIDDLE, TO SPREAD AN EXTRA 20 DEGREES, 268 00:19:36,233 --> 00:19:38,935 CONVERTING THOSE CHOPSTICKS INTO A CATCHER'S MITT. 269 00:19:39,004 --> 00:19:41,372 Yanega: THROUGH THIS FLEXION OF THEIR JAWS, 270 00:19:41,441 --> 00:19:44,242 THEY ARE ABLE TO MAKE A REALLY LARGE CAPTURE SURFACE. 271 00:19:48,615 --> 00:19:50,049 Abraham: WITH THAT BIG GULP, 272 00:19:50,117 --> 00:19:52,518 A HUMMINGBIRD MANAGES TO KEEP ITS LONG BILL 273 00:19:52,587 --> 00:19:53,887 OUT OF THE WAY. 274 00:19:53,956 --> 00:19:56,992 AND THAT MAKES IT A LETHAL PREDATOR. 275 00:19:57,059 --> 00:20:02,063 LESS LIKE "TINKERBELL," AND MORE LIKE "JAWS." 276 00:20:14,948 --> 00:20:17,783 WHETHER THEY'RE FEEDING ON BUGS OR BLOSSOMS, 277 00:20:17,852 --> 00:20:19,419 HUMMINGBIRDS MUST CONSUME 278 00:20:19,487 --> 00:20:24,257 A LOT OF FOOD JUST TO MAKE IT THROUGH THE DAY. 279 00:20:24,326 --> 00:20:29,363 ON AVERAGE, MORE THAN HALF THEIR BODY WEIGHT, IN NECTAR ALONE. 280 00:20:34,806 --> 00:20:38,175 THAT MEANS VISITING MORE THAN A THOUSAND FLOWERS 281 00:20:38,244 --> 00:20:40,345 BETWEEN DAWN AND DUSK. 282 00:20:58,368 --> 00:21:00,069 AND IT'S NO WONDER THEY EAT SO MUCH -- 283 00:21:00,137 --> 00:21:04,374 A HUMMINGBIRD'S METABOLISM 284 00:21:04,443 --> 00:21:08,010 IS STUCK IN OVERDRIVE. 285 00:21:08,080 --> 00:21:10,981 EVEN AT REST, 286 00:21:11,050 --> 00:21:15,120 THE BIRD'S HEART RATE CAN BE UP TO 600 BEATS PER MINUTE. 287 00:21:15,189 --> 00:21:17,022 [ HEART BEATING RAPIDLY ] 288 00:21:17,092 --> 00:21:20,594 AND THAT CAN DOUBLE WHEN IT'S FLYING. 289 00:21:20,662 --> 00:21:23,997 [ HEART BEATING MORE RAPIDLY ] 290 00:21:24,066 --> 00:21:25,900 [ WINGS HUMMING ] 291 00:21:25,969 --> 00:21:27,403 AND THOSE TINY WINGS 292 00:21:27,471 --> 00:21:30,706 BEAT UP TO 200 TIMES EVERY SECOND. 293 00:21:35,680 --> 00:21:37,615 IT'S AN ENDLESS CYCLE -- 294 00:21:37,683 --> 00:21:40,784 CONSTANT FEEDING GIVES HUMMERS 295 00:21:40,853 --> 00:21:43,688 THE ENERGY TO STAY ON THE MOVE. 296 00:21:43,757 --> 00:21:45,558 BUT THEY BURN CALORIES 297 00:21:45,626 --> 00:21:49,429 AT SUCH A STEEP RATE, IT LEAVES THEM ONLY 298 00:21:49,499 --> 00:21:51,399 A NARROW MARGIN OF SURVIVAL. 299 00:21:58,342 --> 00:22:01,144 TO FIND ENOUGH TO EAT, SOME HUMMINGBIRDS, 300 00:22:01,212 --> 00:22:03,247 LIKE THE WHITE-WHISKERED HERMIT, 301 00:22:03,315 --> 00:22:05,216 RANGE OVER A WIDE AREA, 302 00:22:05,284 --> 00:22:08,819 FEEDING ON ANY AVAILABLE FLOWERS. 303 00:22:08,888 --> 00:22:12,390 OTHERS, LIKE THIS GREEN-CROWNED BRILLIANT, 304 00:22:12,459 --> 00:22:15,794 STAKE OUT A PATCH OF NECTAR-RICH FLOWERS 305 00:22:15,863 --> 00:22:18,031 AND DEFEND IT AT ALL COSTS. 306 00:22:27,411 --> 00:22:31,714 HUMMINGBIRDS WON'T TOLERATE TRESPASSERS, 307 00:22:31,783 --> 00:22:34,751 AND THEIR AERIAL DOGFIGHTS ARE INTENSE. 308 00:22:51,441 --> 00:22:54,710 FOR BOTH BIRDS, THE NECTAR IN THESE FLOWERS 309 00:22:54,778 --> 00:22:58,281 COULD BE THE DIFFERENCE BETWEEN LIFE AND DEATH. 310 00:23:02,153 --> 00:23:06,657 BUT FINDING FOOD IS ONLY PART OF THE EQUATION. 311 00:23:06,726 --> 00:23:10,929 CONSERVING ENERGY IS CRUCIAL, TOO. 312 00:23:14,870 --> 00:23:17,804 AT NIGHT, WHEN A HUMMINGBIRD CAN'T FEED, 313 00:23:17,873 --> 00:23:21,243 IT FACES THE RISK OF SIMPLY RUNNING OUT OF FUEL 314 00:23:21,311 --> 00:23:24,580 AND PERISHING IN ITS SLEEP. 315 00:23:24,649 --> 00:23:27,917 ONCE AGAIN, HUMMERS HAVE EVOLVED A WAY OF 316 00:23:27,986 --> 00:23:30,054 DEALING WITH THE PROBLEM. 317 00:23:38,165 --> 00:23:39,499 WHEN DARKNESS FALLS, 318 00:23:39,567 --> 00:23:42,302 THE HUMMINGBIRD SETTLES ONTO A SAFE PERCH, 319 00:23:42,371 --> 00:23:45,373 AND IT FLUFFS UP ITS FEATHERS LIKE A DOWN COAT 320 00:23:45,441 --> 00:23:47,642 TO RETAIN BODY HEAT. 321 00:23:47,709 --> 00:23:53,281 INFRARED VIDEO SHOWS WARMER AREAS AS RED, COOLER AS BLUE. 322 00:23:56,554 --> 00:23:59,055 AS THE TEMPERATURE CONTINUES TO FALL, 323 00:23:59,124 --> 00:24:01,393 THE HUMMINGBIRD CONSERVES ENERGY 324 00:24:01,460 --> 00:24:04,861 BY ADJUSTING ITS THERMOSTAT, AND PRODUCING LESS HEAT. 325 00:24:04,930 --> 00:24:10,335 IT ENTERS A LOW-ENERGY STATE CALLED "TORPOR." 326 00:24:10,405 --> 00:24:13,540 IT'S LIKE GOING INTO HIBERNATION. 327 00:24:17,013 --> 00:24:19,547 THE BIRD'S BODY TEMPERATURE, 328 00:24:19,616 --> 00:24:21,850 NORMALLY 105 DEGREES FAHRENHEIT, 329 00:24:21,918 --> 00:24:23,819 CAN DROP BY MORE THAN HALF. 330 00:24:26,858 --> 00:24:29,727 IN INFRARED, THE HUMMINGBIRD IN TORPOR 331 00:24:29,796 --> 00:24:33,264 APPEARS AS COOL BLUE, LIKE THE AIR AROUND IT. 332 00:24:40,342 --> 00:24:43,344 AND ITS HEART RATE SLOWS WAY DOWN -- 333 00:24:43,412 --> 00:24:46,180 TO AS LOW AS 36 BEATS PER MINUTE. 334 00:24:46,249 --> 00:24:48,183 [ HEART BEATING SLOWLY ] 335 00:24:54,258 --> 00:24:55,625 THEN, WHEN THE AIR WARMS 336 00:24:55,693 --> 00:24:57,961 AT DAWN, THE BIRD SLOWLY EMERGES 337 00:24:58,029 --> 00:25:00,631 FROM TORPOR -- 338 00:25:00,700 --> 00:25:03,836 AND ITS VITAL SIGNS RAMP BACK UP TO NORMAL. 339 00:25:12,481 --> 00:25:16,751 SOME HUMMINGBIRDS HAVE FOUND ANOTHER WAY TO SAVE ENERGY. 340 00:25:26,766 --> 00:25:31,936 INSTEAD OF HOVERING TO FEED, THE ANDEAN HILLSTAR HOPS. 341 00:25:40,682 --> 00:25:42,149 THE HILLSTAR LIVES ON 342 00:25:42,217 --> 00:25:44,852 THE HIGH VOLCANIC PLAINS OF SOUTH AMERICA, 343 00:25:44,921 --> 00:25:48,256 AT AN ALTITUDE OF 12,000 FEET. 344 00:25:48,325 --> 00:25:52,896 THE THIN MOUNTAIN AIR MAKES IT MORE DIFFICULT TO FLY, 345 00:25:52,964 --> 00:25:56,332 LET ALONE HOVER. 346 00:25:56,401 --> 00:26:00,671 FORTUNATELY, MOST OF THE FLOWERS HERE GROW CLOSE TO THE GROUND. 347 00:26:05,279 --> 00:26:07,414 THIS MAY SEEM LIKE A STRANGE 348 00:26:07,483 --> 00:26:10,251 FORAGING TECHNIQUE FOR A HUMMINGBIRD. 349 00:26:10,319 --> 00:26:14,955 HOPPING AND PERCHING CONSUME A LOT LESS ENERGY THAN HOVERING. 350 00:26:27,306 --> 00:26:29,607 WITH THEIR AMAZING ADAPTATIONS, 351 00:26:29,676 --> 00:26:33,078 HUMMINGBIRDS CAN SURVIVE EXTREME CONDITIONS. 352 00:26:33,146 --> 00:26:36,916 THE SURVIVAL OF A SPECIES, 353 00:26:36,985 --> 00:26:42,122 HOWEVER, INVOLVES A WHOLE OTHER SET OF SKILLS. 354 00:26:42,192 --> 00:26:47,796 FOR HUMMINGBIRDS, AS FOR MANY OTHER CREATURES, 355 00:26:47,866 --> 00:26:50,701 SEX IS A GAME IN WHICH FEMALES MAKE THE RULES. 356 00:26:55,308 --> 00:26:58,176 A FEMALE KNOWS EXACTLY WHAT SHE'S LOOKING FOR. 357 00:26:58,245 --> 00:27:03,048 IT'S UP TO MALES TO MAKE A GOOD IMPRESSION. 358 00:27:06,889 --> 00:27:10,558 [ CALLING ] 359 00:27:10,627 --> 00:27:13,962 SOME MALES LIKE TO ANNOUNCE THEIR PRESENCE WITH A SONG, 360 00:27:14,031 --> 00:27:16,097 LIKE THE INSISTENT CHIRPING 361 00:27:16,166 --> 00:27:19,268 OF THIS ECUADORIAN LONG-BILLED HERMIT. 362 00:27:24,911 --> 00:27:30,649 THE LONG-TAILED SYLPH USES HIS FEATHERS TO WOO A MATE. 363 00:27:30,718 --> 00:27:35,688 ONLY THE MALE SPORTS THAT EXTRAVAGANT ACCESSORY. 364 00:27:41,097 --> 00:27:44,567 WHEN A MALE RUFOUS SPOTS A FEMALE IN HIS TERRITORY, 365 00:27:44,635 --> 00:27:49,939 HE LAUNCHES INTO A DANCE, BEST APPRECIATED IN SLOW MOTION. 366 00:27:58,986 --> 00:28:01,187 WHILE HE SHUTTLES BACK AND FORTH, 367 00:28:01,255 --> 00:28:05,224 THE FEMALE PLAYS COY, HIDING IN THE FLOWERS. 368 00:28:05,293 --> 00:28:09,096 BUT HE KNOWS RIGHT WHERE HIS AUDIENCE IS. 369 00:28:17,242 --> 00:28:19,143 WHEN IT COMES TO HUMMINGBIRD MATING DISPLAYS, 370 00:28:19,211 --> 00:28:23,914 NOTHING CAN TOUCH THE ANNA'S. 371 00:28:23,984 --> 00:28:28,020 MALE ANNA'S, WITH THEIR TRADEMARK 372 00:28:28,089 --> 00:28:30,223 FIERY RED CROWNS AND NECKS, 373 00:28:30,291 --> 00:28:32,392 PUT ON AN ELABORATE DISPLAY 374 00:28:32,460 --> 00:28:35,762 TO INTIMIDATE RIVALS AND ATTRACT A MATE. 375 00:28:39,168 --> 00:28:42,804 THE MAIN EVENT IS A STEEP DIVE AT BREAKNECK SPEED -- 376 00:28:42,873 --> 00:28:45,441 ALMOST TOO FAST FOR THE HUMAN EYE. 377 00:28:45,510 --> 00:28:48,245 [ BRIEF SQUEAK ] 378 00:28:48,313 --> 00:28:49,981 YOU MAY HAVE MISSED IT, 379 00:28:50,050 --> 00:28:53,317 BUT THE FEMALE CERTAINLY NOTICED. 380 00:28:53,386 --> 00:28:54,687 HERE'S ANOTHER LOOK. 381 00:28:54,755 --> 00:28:55,821 [ SQUEAK ] 382 00:28:55,889 --> 00:28:58,557 THERE'S ONE THING YOU CAN'T MISS -- 383 00:28:58,626 --> 00:29:02,195 EVERY DIVE IS PUNCTUATED BY A HIGH-PITCHED SQUEAK. 384 00:29:02,264 --> 00:29:03,865 [ SQUEAK ] 385 00:29:03,933 --> 00:29:06,902 SO THIS IS THE TERRITORY I WAS TELLING YOU ABOUT... 386 00:29:06,971 --> 00:29:08,403 Abraham: BIOLOGIST CHRIS CLARKE 387 00:29:08,471 --> 00:29:11,339 IS INVESTIGATING THE ANNA'S MATING DISPLAY. 388 00:29:11,408 --> 00:29:15,078 HE AND HIS ASSISTANT, TERESA FEO, 389 00:29:15,147 --> 00:29:16,814 HAVE BROUGHT SOME SPECIALIZED GEAR 390 00:29:16,882 --> 00:29:20,417 TO A PARK ON THE EDGE OF SAN FRANCISCO BAY. 391 00:29:20,486 --> 00:29:22,320 Clarke: OKAY, IT'S RIGHT THERE. 392 00:29:22,389 --> 00:29:23,822 Feo: OH, I SEE -- YEAH. 393 00:29:23,890 --> 00:29:25,323 Clarke: THE FEMALE WILL GO AROUND 394 00:29:25,392 --> 00:29:26,559 TO SEVERAL MALES' TERRITORIES, 395 00:29:26,626 --> 00:29:28,094 AND THE MALE IS DOING THIS DISPLAY 396 00:29:28,163 --> 00:29:29,262 IN AN EFFORT TO IMPRESS HER, 397 00:29:29,330 --> 00:29:31,198 TO TRY AND CONVINCE A FEMALE TO MATE WITH HIM, 398 00:29:31,266 --> 00:29:33,034 RATHER THAN WITH THAT OTHER GUY OVER THERE. 399 00:29:33,102 --> 00:29:34,502 Abraham: THE MALE'S DIVE 400 00:29:34,571 --> 00:29:37,272 IS HIS WAY OF FLAUNTING HIS PHYSICAL FITNESS, 401 00:29:37,340 --> 00:29:40,608 AND THAT UNUSUAL CHIRP IS A KIND OF SERENADE 402 00:29:40,677 --> 00:29:42,244 TO HELP WIN HER OVER. 403 00:29:42,313 --> 00:29:46,449 BUT CHRIS IS CURIOUS TO KNOW HOW THE MALE MAKES THAT NOISE. 404 00:29:46,518 --> 00:29:48,219 Clarke: THE SOUND SOUNDS VOCAL. 405 00:29:48,287 --> 00:29:50,388 PEOPLE THINK THAT IT'S MADE VOCALLY, 406 00:29:50,456 --> 00:29:52,057 JUST LIKE THEIR SONG IS VOCAL. 407 00:29:52,126 --> 00:29:54,627 BUT THERE'S ALSO A GROUP OF PEOPLE OUT THERE 408 00:29:54,696 --> 00:29:57,330 THAT THINK THAT IT MAY BE THE TAIL THAT MAKES THE SOUND. 409 00:29:57,397 --> 00:29:59,332 BUT NOBODY HAS TESTED THIS IDEA BEFORE. 410 00:29:59,400 --> 00:30:03,204 Abraham: CHRIS AND TERESA WILL USE A HIGH-SPEED VIDEO CAMERA 411 00:30:03,272 --> 00:30:07,642 TO RECORD THE DIVES AT 500 FRAMES PER SECOND. 412 00:30:07,711 --> 00:30:11,480 A SENSITIVE MICROPHONE WILL CAPTURE THE CHIRPS. 413 00:30:11,550 --> 00:30:12,983 THE REAL TRICK 414 00:30:13,051 --> 00:30:14,618 WILL BE GETTING THE MALE TO DIVE 415 00:30:14,685 --> 00:30:16,453 RIGHT IN FRONT OF CHRIS'S CAMERA. 416 00:30:16,521 --> 00:30:19,023 Clarke: IT IS QUITE A CHALLENGE TO FILM THESE GUYS. 417 00:30:19,092 --> 00:30:20,592 WHEN THEY'RE DIVING, THEY GO -- 418 00:30:20,660 --> 00:30:22,361 WE THINK AT ABOUT 60 MILES AN HOUR OR SO, 419 00:30:22,429 --> 00:30:24,798 AND, OF COURSE, THIS IS A LITTLE BIRD THAT'S ABOUT THIS BIG, 420 00:30:24,866 --> 00:30:27,500 WHIZZING BY AT THE SPEED OF FREEWAY TRAFFIC. 421 00:30:27,569 --> 00:30:31,972 Abraham: CHRIS KNOWS THAT MALES TEND TO DIVE TOWARD THE SUN, 422 00:30:32,041 --> 00:30:34,376 TO SHOW OFF THEIR RED MARKINGS TO BEST ADVANTAGE, 423 00:30:34,443 --> 00:30:36,378 AND THAT HELPS HIM POSITION THE CAMERA. 424 00:30:36,446 --> 00:30:39,215 HE'LL BE COMING FROM OVER HERE, SO RIGHT HERE 425 00:30:39,284 --> 00:30:40,851 WOULD BE A GOOD PLACE FOR THE CAMERA. 426 00:30:40,919 --> 00:30:43,953 Abraham: TO PROVOKE THE MALE INTO PUTTING ON A DISPLAY, 427 00:30:44,022 --> 00:30:47,724 THEY PLACE A FEMALE INSIDE A MESH ENCLOSURE. 428 00:30:47,794 --> 00:30:49,227 AND AS ADDED INSURANCE, 429 00:30:49,296 --> 00:30:51,430 ANOTHER FEMALE -- A STUFFED ONE -- 430 00:30:51,498 --> 00:30:52,932 IS MOUNTED ON A POLE. 431 00:30:53,001 --> 00:30:56,103 Clarke: THIS IS A FEMALE THAT WE GOT FROM A WILDLIFE HOSPITAL. 432 00:30:56,172 --> 00:30:58,273 SHE DIDN'T SURVIVE AFTER BEING ADMITTED. 433 00:30:58,340 --> 00:31:02,342 Abraham: WITH THEIR GEAR IN PLACE AND READY TO ROLL, 434 00:31:02,412 --> 00:31:05,681 THERE'S NOTHING TO DO BUT WAIT FOR THE SHOW TO START. 435 00:31:05,749 --> 00:31:08,018 AND IT DOESN'T TAKE LONG. 436 00:31:08,085 --> 00:31:09,953 HE'S GOING UP FOR A DIVE! 437 00:31:10,022 --> 00:31:11,823 THE MALE BEGINS HIS DISPLAY 438 00:31:11,890 --> 00:31:14,525 BY FLYING STRAIGHT UP ABOUT A HUNDRED FEET 439 00:31:14,593 --> 00:31:16,760 AND HOVERING TO ATTRACT ATTENTION. 440 00:31:16,830 --> 00:31:19,932 THEN HE PLUNGES TOWARD THE GROUND 441 00:31:20,000 --> 00:31:22,802 IN A DEATH-DEFYING DIVE. 442 00:31:22,871 --> 00:31:25,672 Clarke: DESCENDING! [ SQUEAK ] 443 00:31:25,740 --> 00:31:27,107 DIVE ONE... HE'S GOING UP. 444 00:31:27,176 --> 00:31:29,444 [ SQUEAK ] THAT WAS DIVE 2. 445 00:31:29,512 --> 00:31:30,679 GOING UP. 446 00:31:30,747 --> 00:31:32,180 [ SQUEAK ] DIVE 3. 447 00:31:32,248 --> 00:31:33,514 THAT WAS DIVE 3. 448 00:31:33,583 --> 00:31:36,819 Clarke: ESTIMATES I HAVE FROM VIDEOS 449 00:31:36,888 --> 00:31:38,722 ARE THAT THE G-FORCES ARE ABOUT 10 G's... 450 00:31:38,789 --> 00:31:41,291 [ SQUEAK ] DIVE 7! 451 00:31:41,360 --> 00:31:43,294 WHICH IS ABOUT THE SAME AS WHAT A PILOT BLACKS OUT UNDER 452 00:31:43,363 --> 00:31:45,264 IN FIGHTER AIRCRAFT. [ SQUEAK ] 453 00:31:45,332 --> 00:31:47,233 DIVE 14. DIVE 14. 454 00:31:47,301 --> 00:31:48,600 Clarke: IT'S PHENOMENAL THAT THIS IS JUST 455 00:31:48,668 --> 00:31:50,135 A ROUTINE PART OF THEIR DISPLAYS THAT THEY DO. 456 00:31:50,204 --> 00:31:52,739 DESCENDING -- DIVE 16. [ SQUEAK ] 457 00:31:52,806 --> 00:31:55,909 OKAY, HE'S BACK ON HIS PERCH. 458 00:31:58,381 --> 00:31:59,814 YEAH, CHECK THIS OUT! 459 00:31:59,883 --> 00:32:01,583 Abraham: NOW THAT THEY'VE RECORDED 460 00:32:01,651 --> 00:32:04,719 MORE THAN A DOZEN DIVES, THEY CAN TAKE A CLOSER LOOK -- 461 00:32:04,788 --> 00:32:06,022 IN SLOW MOTION. 462 00:32:06,090 --> 00:32:08,124 SO RIGHT NOW YOU CAN SEE HE'S JUST OFF-SCREEN UP HERE, 463 00:32:08,193 --> 00:32:11,461 BUT HE'S GOING TO APPEAR AND HE'S GOING TO COME DOWN. 464 00:32:11,530 --> 00:32:13,298 SEE THAT? HE SPREADS HIS TAIL! 465 00:32:13,366 --> 00:32:14,732 YEAH, THAT'S REALLY COOL! 466 00:32:14,801 --> 00:32:17,403 AND HE HAS HIS TAIL SPREAD FOR THE SAME AMOUNT OF TIME 467 00:32:17,471 --> 00:32:19,239 AS IT TAKES HIM TO MAKE THE SOUND. 468 00:32:19,307 --> 00:32:21,473 [ DISTORTED SQUEAK ] 469 00:32:21,542 --> 00:32:23,743 Abraham: THE MALE IS SPREADING HIS TAIL FEATHERS 470 00:32:23,812 --> 00:32:29,550 RIGHT AT THE BOTTOM OF THE DIVE. 471 00:32:29,619 --> 00:32:32,354 THE ACTION LASTS JUST 60 MILLISECONDS, 472 00:32:32,423 --> 00:32:35,825 BUT IT COINCIDES PRECISELY WITH THE MALE'S CHIRP. 473 00:32:35,894 --> 00:32:37,693 WOW, THAT'S REALLY COOL. 474 00:32:37,762 --> 00:32:39,530 Abraham: IS IT JUST A COINCIDENCE, 475 00:32:39,597 --> 00:32:41,999 OR ARE THE FEATHERS ACTUALLY PRODUCING THE SOUND? 476 00:32:42,068 --> 00:32:43,902 [ SQUEAK ] 477 00:32:43,970 --> 00:32:45,703 CHRIS HAS DEVISED A SIMPLE 478 00:32:45,772 --> 00:32:48,374 BUT INGENIOUS WAY TO TEST THE THEORY. 479 00:32:48,443 --> 00:32:51,211 Clarke: WE HAVE TUBES THAT HAVE AIR COMING THROUGH THEM, 480 00:32:51,280 --> 00:32:53,147 FROM AN AIR SOURCE. 481 00:32:53,214 --> 00:32:54,448 WHEN WE PUT THE FEATHER HERE, 482 00:32:54,516 --> 00:32:56,751 WE PUT IT IN A JET OF AIR THAT'S MOVING 60 MILES AN HOUR. 483 00:32:56,819 --> 00:32:59,520 [ WHISTLING ] 484 00:32:59,589 --> 00:33:03,525 Abraham: THE FEATHER MAKES A SOUND, 485 00:33:03,594 --> 00:33:05,963 VIBRATING LIKE A REED IN A CLARINET. 486 00:33:06,031 --> 00:33:10,033 IT'S A DEAD MATCH FOR THE MALE ANNA'S CHIRP. 487 00:33:10,102 --> 00:33:13,004 [ SQUEAK ] YEAH, RIGHT THERE. 488 00:33:13,073 --> 00:33:15,607 THE EXPERIMENT PROVES THAT THE TAIL FEATHERS 489 00:33:15,676 --> 00:33:17,910 ARE MAKING THE SOUND. 490 00:33:17,979 --> 00:33:19,412 SOMEHOW THE MALE IS ABLE TO DIVE 491 00:33:19,481 --> 00:33:21,148 AT JUST THE RIGHT ANGLE AND SPEED, 492 00:33:21,216 --> 00:33:24,784 SO HIS TAIL FEATHERS PRODUCE THE PRECISE FREQUENCY 493 00:33:24,854 --> 00:33:28,690 THAT THE FEMALE IS LOOKING FOR. 494 00:33:28,758 --> 00:33:30,960 BY SHOWING OFF HIS FLYING SKILL 495 00:33:31,028 --> 00:33:35,365 HE LETS HER KNOW THAT HE'S A GOOD CHOICE FOR A MATE. 496 00:33:35,434 --> 00:33:38,269 [ SQUEAK ] 497 00:33:51,887 --> 00:33:57,624 MALE HUMMINGBIRDS USE ANOTHER LURE TO ATTRACT A FEMALE -- 498 00:33:57,693 --> 00:34:00,629 IRIDESCENT FEATHERS. 499 00:34:00,697 --> 00:34:03,900 LOOK AT THEM ONE WAY, AND THEY'RE DULL -- 500 00:34:03,968 --> 00:34:06,603 BLACK OR BROWN. 501 00:34:06,672 --> 00:34:10,375 BUT WHEN THE LIGHT HITS THEM JUST RIGHT, 502 00:34:10,444 --> 00:34:13,278 THOSE FEATHERS SHIMMER. 503 00:34:19,422 --> 00:34:21,589 AS USUAL IN THE BIRD WORLD, 504 00:34:21,657 --> 00:34:26,227 IT'S THE MALES THAT REALLY SHINE. 505 00:34:26,297 --> 00:34:30,666 THEIR NAMES OFTEN REFLECT THEIR FLASHIEST ATTRIBUTE -- 506 00:34:30,734 --> 00:34:33,570 "PURPLE-THROATED"... 507 00:34:33,638 --> 00:34:35,973 "RUBY-THROATED"... 508 00:34:36,042 --> 00:34:39,678 "FIRECROWNED"... 509 00:34:39,746 --> 00:34:43,649 SURPRISINGLY, A HUMMINGBIRD'S COLORS 510 00:34:43,718 --> 00:34:46,852 ARE NOT THE RESULT OF PIGMENTS. 511 00:34:46,921 --> 00:34:51,792 INSTEAD, THEY'RE CREATED BY SPECIAL CELLS IN THE FEATHERS 512 00:34:51,860 --> 00:34:56,965 THAT BREAK DOWN LIGHT AND EMIT PARTICULAR WAVELENGTHS. 513 00:34:57,034 --> 00:35:02,105 THOSE COLORS ENSURE THAT WHEN THE MALE HUMMER TURNS HIS HEAD, 514 00:35:02,173 --> 00:35:07,677 IT'S THE BEST WAY TO CATCH HER EYE. 515 00:35:07,747 --> 00:35:13,685 WHATEVER TRICK HE USES TO MAKE HIMSELF ATTRACTIVE, 516 00:35:13,755 --> 00:35:15,789 IF A MALE IS PERSUASIVE ENOUGH, 517 00:35:15,857 --> 00:35:18,625 A FEMALE MIGHT DECIDE TO MATE WITH HIM. 518 00:35:18,693 --> 00:35:22,530 BUT THE RELATIONSHIP WON'T LAST. 519 00:35:22,599 --> 00:35:26,635 SHE'LL MAKE HER HOME AND RAISE HER YOUNG ALONE. 520 00:35:31,844 --> 00:35:34,345 FEMALE HUMMINGBIRDS BUILD THEIR NESTS 521 00:35:34,413 --> 00:35:37,449 WITH SOFT BITS OF LEAVES, FEATHERS, OR LICHEN, 522 00:35:37,518 --> 00:35:40,019 OFTEN PASTED TOGETHER WITH SPIDER WEBS, 523 00:35:40,086 --> 00:35:42,288 TO MAKE THEM STRONG AND STRETCHY. 524 00:35:45,694 --> 00:35:47,295 NESTS VARY ENORMOUSLY, 525 00:35:47,364 --> 00:35:51,098 DEPENDING ON THE SPECIES AND THE MATERIALS AVAILABLE. 526 00:35:55,173 --> 00:35:57,740 IN THE DENSE LOWLAND FORESTS OF ECUADOR, 527 00:35:57,809 --> 00:36:02,146 THE BUFF-TAILED SICKLEBILL BUILDS HERS OVER A STREAM 528 00:36:02,215 --> 00:36:03,649 FOR DEFENSE AGAINST PREDATORS. 529 00:36:03,716 --> 00:36:07,485 AND SHE ATTACHES IT TO THE UNDERSIDE OF A LEAF 530 00:36:07,554 --> 00:36:11,323 TO PROVIDE SHADE. 531 00:36:11,393 --> 00:36:16,963 THE BRONZY INCA LIVES ON THE WESTERN SLOPES OF THE ANDES. 532 00:36:20,203 --> 00:36:25,039 SHE USES LONG STRANDS OF MOSS TO BIND HER NEST TO A BRANCH. 533 00:36:31,585 --> 00:36:36,354 A FEMALE USUALLY LAYS TWO TINY EGGS. 534 00:36:36,423 --> 00:36:40,992 THE CHICKS EMERGE IN A COUPLE OF WEEKS. 535 00:36:46,336 --> 00:36:48,270 [ CHIRPING ] 536 00:36:58,684 --> 00:37:00,118 THEY GROW FAST, 537 00:37:00,185 --> 00:37:03,488 ON A STEADY DIET OF REGURGITATED NECTAR AND INSECTS. 538 00:37:06,394 --> 00:37:09,328 SOON, THEY'RE BIGGER THAN THEIR MOTHER. 539 00:37:09,397 --> 00:37:11,732 AND THEY'LL KEEP ON GROWING 540 00:37:11,799 --> 00:37:15,369 UNTIL THEY'VE NEARLY OUTGROWN THE NEST. 541 00:37:26,618 --> 00:37:28,319 EVEN AFTER THEY FLEDGE, 542 00:37:28,387 --> 00:37:31,088 THE CHICKS WILL STILL RELY ON THEIR MOTHER FOR A WHILE. 543 00:37:34,261 --> 00:37:37,330 ONCE THEY'RE FINALLY FENDING FOR THEMSELVES, 544 00:37:37,399 --> 00:37:39,900 THEY'LL LOSE THOSE FLUFFY FEATHERS 545 00:37:39,968 --> 00:37:43,470 AND BURN OFF THEIR BABY FAT. 546 00:37:51,882 --> 00:37:55,251 IN THE CHIRACAHUA MOUNTAINS OF SOUTHEASTERN ARIZONA, 547 00:37:55,321 --> 00:37:58,955 SOME HUMMINGBIRD MOMS HAVE COME UP WITH A UNIQUE STRATEGY 548 00:37:59,024 --> 00:38:00,525 FOR SUCCESSFUL NESTING. 549 00:38:03,464 --> 00:38:07,300 BIOLOGIST HAROLD GREENEY IS AN EXPERT ON THE SUBJECT. 550 00:38:07,369 --> 00:38:10,604 Greeney: SO WE JUST HAVE THIS SMALL DETOUR RIGHT HERE. 551 00:38:10,673 --> 00:38:13,140 Abraham: HE HAS A TALENT FOR FINDING NESTS. 552 00:38:13,209 --> 00:38:16,611 Greeney: AND IT'S RIGHT IN THERE ON THAT SECOND BRANCH. 553 00:38:16,680 --> 00:38:18,280 SEE IT BACK THERE? 554 00:38:18,349 --> 00:38:20,616 Abraham: THE FEMALE BLACK-CHINNED HUMMINGBIRD 555 00:38:20,685 --> 00:38:22,353 BUILDS HER WALNUT-SIZED NEST 556 00:38:22,420 --> 00:38:25,121 ON A HIGH TREE LIMB. 557 00:38:25,190 --> 00:38:28,159 WE'LL CHECK IT OUT HERE. 558 00:38:30,897 --> 00:38:34,166 Abraham: EVEN WAY UP HERE, 559 00:38:34,235 --> 00:38:35,736 HUMMINGBIRD NESTS ARE VULNERABLE -- 560 00:38:35,803 --> 00:38:36,903 OH, YES, STILL GOT EGGS. 561 00:38:36,972 --> 00:38:40,274 SUBJECT TO ATTACK BY A HOST OF MARAUDERS. 562 00:38:40,343 --> 00:38:41,677 HUMMINGBIRD EGGS ARE SO SMALL, 563 00:38:41,745 --> 00:38:43,011 THEY'RE LIKE LITTLE TIC TACS, 564 00:38:43,079 --> 00:38:44,746 THAT JUST ABOUT ANYBODY THAT FINDS THEM 565 00:38:44,814 --> 00:38:45,881 I THINK WOULD EAT THEM. 566 00:38:45,948 --> 00:38:48,617 GREENEY AND HIS TEAM 567 00:38:48,686 --> 00:38:51,454 SPEND A LOT OF TIME MONITORING NESTS AND THEIR CONTENTS. 568 00:38:51,523 --> 00:38:54,892 Greeney: I THINK THIS IS HATCHED TODAY. 569 00:38:54,960 --> 00:38:57,629 Abraham: IT TAKES A VERY SENSITIVE SCALE 570 00:38:57,698 --> 00:38:59,866 TO WEIGH A BABY HUMMINGBIRD. 571 00:38:59,933 --> 00:39:04,703 Greeney: SO, 0.401 GRAMS. 572 00:39:04,773 --> 00:39:08,575 Abraham: THAT'S ABOUT THE WEIGHT OF A POST-IT NOTE. 573 00:39:08,644 --> 00:39:12,781 THERE WE GO, BACK SAFE AND SOUND. 574 00:39:12,849 --> 00:39:17,752 GREENEY RECENTLY DISCOVERED SOMETHING ASTONISHING 575 00:39:17,822 --> 00:39:20,056 ABOUT THESE BLACK-CHINNED NESTS. 576 00:39:20,124 --> 00:39:23,794 IT APPEARS THEIR LOCATIONS ARE ANYTHING BUT RANDOM. 577 00:39:23,862 --> 00:39:27,331 Greeney: WE WERE JUST OUT TO SEE WHAT WE COULD SEE 578 00:39:27,400 --> 00:39:29,167 AND LEARN A LITTLE BIT MORE ABOUT THEIR NESTING, 579 00:39:29,236 --> 00:39:30,870 WHEN WE NOTICED THAT THIS SPECIES OF HUMMINGBIRD 580 00:39:30,938 --> 00:39:32,871 OFTEN HAVE ALL THEIR NESTS 581 00:39:32,940 --> 00:39:35,608 CLUSTERED IN ONE PARTICULAR AREA. 582 00:39:35,677 --> 00:39:38,345 Abraham: IT TURNS OUT THAT RIGHT IN THE MIDDLE 583 00:39:38,414 --> 00:39:40,582 OF EACH CLUSTER OF HUMMINGBIRD NESTS 584 00:39:40,650 --> 00:39:43,485 IS THE NEST OF ANOTHER KIND OF BIRD -- 585 00:39:43,554 --> 00:39:46,589 A COOPER'S HAWK. 586 00:39:49,694 --> 00:39:51,929 COME ON OVER HERE. 587 00:39:51,997 --> 00:39:55,567 THE COOPER'S HAWK JUST LANDED RIGHT NEXT TO THE NEST, 588 00:39:55,635 --> 00:39:57,470 AND HE'S OUT ON THE BRANCH. 589 00:39:57,537 --> 00:40:00,072 Abraham: UNLIKE HUMMINGBIRDS, COOPER'S HAWKS EAT MEAT -- 590 00:40:00,140 --> 00:40:01,575 INCLUDING SQUIRRELS 591 00:40:01,642 --> 00:40:05,110 AND MANY KINDS OF BIRDS. 592 00:40:05,180 --> 00:40:09,049 IN FACT, BIRDS ARE A COOPER'S HAWK SPECIALTY. 593 00:40:09,118 --> 00:40:13,822 THE HAWKS CAN FLY WITH GREAT AGILITY THROUGH A THICK FOREST 594 00:40:13,891 --> 00:40:16,493 TO CATCH THEM ON THE WING. 595 00:40:16,561 --> 00:40:20,597 STRANGELY, THE COOPER'S HAWK'S SKILLS AS A KILLER 596 00:40:20,665 --> 00:40:24,802 MAY BE EXACTLY WHY THE HUMMERS LIKE TO STAY CLOSE. 597 00:40:35,317 --> 00:40:37,317 THE HAWKS' FAVORITE FOODS 598 00:40:37,386 --> 00:40:41,623 ARE ALL ANIMALS THAT PREY ON HUMMINGBIRD NESTS. 599 00:40:41,691 --> 00:40:47,496 BUT THE HUMMINGBIRDS THEMSELVES ARE TOO SMALL 600 00:40:47,566 --> 00:40:50,401 AND FAST FOR THESE BIG RAPTORS TO BOTHER WITH. 601 00:40:53,840 --> 00:40:57,142 SOMEHOW, THE BLACK-CHINS HAVE FIGURED OUT 602 00:40:57,210 --> 00:40:59,946 THAT HAWKS MAKE GOOD NEIGHBORS -- 603 00:41:00,015 --> 00:41:04,418 AND THAT SURVIVAL STRATEGY REALLY PAYS OFF. 604 00:41:07,490 --> 00:41:09,323 SCIENTISTS LIKE HAROLD GREENEY 605 00:41:09,391 --> 00:41:12,527 AREN'T THE ONLY ONES KEEPING A CLOSE EYE ON HUMMINGBIRDS, 606 00:41:12,596 --> 00:41:15,330 OR MAKING SURPRISING NEW DISCOVERIES ABOUT THEM. 607 00:41:18,503 --> 00:41:21,673 IN BATON ROUGE, LOUISIANA, A TEAM OF DETECTIVES 608 00:41:21,741 --> 00:41:25,610 IS SETTING UP A STAKEOUT. 609 00:41:25,679 --> 00:41:28,513 THEY'RE LOOKING FOR A TINY CRITTER 610 00:41:28,583 --> 00:41:33,787 THAT'S NOT NATIVE TO THESE PARTS. 611 00:41:33,856 --> 00:41:39,194 ONCE THEIR TRAP IS SET, THEY ONLY HAVE TO WATCH AND WAIT. 612 00:41:44,335 --> 00:41:46,203 Woman: WE GOT ONE! 613 00:41:46,270 --> 00:41:48,772 [ CHUCKLING ] 614 00:41:48,841 --> 00:41:51,576 Abraham: HEADING UP THE TEAM IS NANCY NEWFIELD. 615 00:41:51,645 --> 00:41:55,280 SHE'S A LICENSED HUMMINGBIRD BANDER. 616 00:41:55,349 --> 00:41:59,752 NANCY IS PART OF A NETWORK OF BANDERS ACROSS NORTH AMERICA, 617 00:41:59,821 --> 00:42:02,489 KEEPING TABS ON THE BIRDS' MOVEMENTS. 618 00:42:02,557 --> 00:42:04,659 THIS IS A RUBY-THROAT. 619 00:42:04,728 --> 00:42:06,996 THE LITTLE RUBY-THROAT WILL BE HELD CAPTIVE 620 00:42:07,063 --> 00:42:09,564 JUST LONG ENOUGH TO GET A PHYSICAL... 621 00:42:09,634 --> 00:42:10,967 3.4 -- NICE WEIGHT. 622 00:42:11,036 --> 00:42:16,139 AND HAVE A TINY NUMBERED BAND ATTACHED TO HER TINY LEG. 623 00:42:16,207 --> 00:42:19,076 NEXT TIME SHE'S SPOTTED, THAT NUMBER, 624 00:42:19,145 --> 00:42:20,946 CHECKED AGAINST A CENTRAL DATABASE, 625 00:42:21,015 --> 00:42:23,182 WILL PROVIDE CLUES TO WHERE SHE'S TRAVELED. 626 00:42:23,250 --> 00:42:25,852 YOU READY TO GO, SWEETHEART? 627 00:42:25,920 --> 00:42:29,522 Abraham: THE RUBY-THROAT HAS A LONG TRIP AHEAD OF HER. 628 00:42:29,590 --> 00:42:30,991 THERE WE GO. 629 00:42:39,537 --> 00:42:41,371 Abraham: NEARLY ALL OF THE HUMMINGBIRDS 630 00:42:41,439 --> 00:42:44,708 FOUND IN THE U.S. AND CANADA ARE SEASONAL MIGRANTS -- 631 00:42:44,777 --> 00:42:50,414 BREEDING AND NESTING UP NORTH, BUT SPENDING THE WINTER 632 00:42:50,483 --> 00:42:54,086 IN THE TROPICS OF CENTRAL AMERICA. 633 00:42:54,155 --> 00:42:59,859 TWICE A YEAR THEY MAKE A JOURNEY THAT IS TRULY EPIC. 634 00:42:59,929 --> 00:43:01,696 GIVEN THEIR BODY LENGTH, 635 00:43:01,764 --> 00:43:05,466 HUMMINGBIRD MIGRATIONS ARE THE LONGEST OF ANY BIRD. 636 00:43:05,535 --> 00:43:09,605 A RUFOUS MIGHT COVER UP TO 6,000 MILES ROUND TRIP, 637 00:43:09,674 --> 00:43:13,844 SHUTTLING BETWEEN ITS WINTER HOME IN CENTRAL MEXICO 638 00:43:13,913 --> 00:43:16,214 AND THE NORTHERN END OF ITS BREEDING RANGE 639 00:43:16,282 --> 00:43:18,382 IN SOUTHERN ALASKA. 640 00:43:18,450 --> 00:43:21,086 A RUBY-THROAT'S MIGRATION BETWEEN PANAMA 641 00:43:21,154 --> 00:43:24,423 AND ITS SUMMER BREEDING GROUNDS IN THE EASTERN U.S. 642 00:43:24,491 --> 00:43:26,793 IS NEARLY AS LONG. 643 00:43:26,862 --> 00:43:30,631 THAT JOURNEY INCLUDES A MARATHON FLIGHT 644 00:43:30,700 --> 00:43:34,468 ACROSS THE GULF OF MEXICO. 645 00:43:34,537 --> 00:43:39,975 IT'S AN 18-HOUR ORDEAL OVER 500 MILES OF OPEN WATER, 646 00:43:40,045 --> 00:43:43,413 WITH NO PLACE TO STOP, AND NOWHERE TO FEED 647 00:43:43,482 --> 00:43:46,517 UNTIL THEY REACH LAND. 648 00:43:55,830 --> 00:43:57,530 BACK IN BATON ROUGE, 649 00:43:57,599 --> 00:44:00,769 NANCY NEWFIELD IS MAKING HOUSE CALLS. 650 00:44:01,938 --> 00:44:04,406 I HEAR A CUSTOMER. 651 00:44:04,475 --> 00:44:07,843 THIS IS AN ADULT MALE RUFOUS. 652 00:44:07,912 --> 00:44:11,581 AND -- OH, HE'S A LOOKER. 653 00:44:11,650 --> 00:44:13,717 Abraham: SOME OF THE BIRDS SHE CATCHES 654 00:44:13,787 --> 00:44:15,120 ARE ALREADY WEARING BANDS. 655 00:44:15,188 --> 00:44:17,890 Newfield: 358 -- SO THAT'S TWO YEARS AGO. 656 00:44:17,958 --> 00:44:19,959 Abraham: AND A FEW WERE EVEN BANDED 657 00:44:20,028 --> 00:44:21,560 RIGHT HERE ON PREVIOUS TRIPS. 658 00:44:21,628 --> 00:44:24,097 I'VE HAD RUFOUS COME BACK FOR EIGHT YEARS, 659 00:44:24,166 --> 00:44:28,269 RUBYTHROATS, BLACK-CHINS, CALLIOPES FOR UP TO SIX. 660 00:44:28,337 --> 00:44:30,138 Abraham: BANDERS HAVE DISCOVERED 661 00:44:30,207 --> 00:44:33,075 THAT HUMMINGBIRDS CAN LIVE AS LONG AS 12 YEARS -- 662 00:44:33,143 --> 00:44:37,412 A RIPE OLD AGE FOR SUCH A SMALL ANIMAL. 663 00:44:37,481 --> 00:44:40,117 LET HER SIT IN YOUR HAND. 664 00:44:40,186 --> 00:44:43,521 AND THE BIRDS FOLLOW THE SAME ROUTES YEAR AFTER YEAR, 665 00:44:43,589 --> 00:44:47,092 RETURNING TO THE VERY SAME GARDENS AND BREEDING GROUNDS. 666 00:44:47,161 --> 00:44:51,031 [ BIRD CHIRPS, NEWFIELD LAUGHS ] 667 00:44:51,099 --> 00:44:54,301 [ BIRD CHIRPING ] 668 00:44:54,369 --> 00:44:57,771 Newfield: THIS IS A BANDED BIRD, A RETURNEE ADULT MALE RUFOUS. 669 00:44:57,841 --> 00:45:02,144 3.9, SO HE'S GETTING A LITTLE PORKY. 670 00:45:02,213 --> 00:45:04,413 HE'S PUTTING ON WEIGHT, GETTING READY TO LEAVE. 671 00:45:04,482 --> 00:45:07,218 Abraham: TO SURVIVE THE RIGORS OF THEIR LONG MIGRATION -- 672 00:45:07,286 --> 00:45:08,386 HE'S GOT A FAT OF TWO. 673 00:45:08,454 --> 00:45:10,187 HUMMERS GO ON AN EATING BINGE, 674 00:45:10,255 --> 00:45:12,289 AND STORE THE EXTRA FOOD AS FAT. 675 00:45:12,358 --> 00:45:14,993 ZERO CORRUGATIONS. 676 00:45:15,062 --> 00:45:17,997 THEY MAY DOUBLE THEIR WEIGHT BEFORE SETTING OUT, 677 00:45:18,066 --> 00:45:21,368 PUTTING ON THE EXTRA TWO OR THREE GRAMS 678 00:45:21,436 --> 00:45:24,705 TO SUSTAIN THEM ON THEIR JOURNEY. 679 00:45:30,413 --> 00:45:34,116 FOR THE MIGRANT HUMMERS, THERE'S PLENTY TO EAT -- 680 00:45:34,185 --> 00:45:36,652 AS MORE AND MORE GARDENERS AND BACKYARD BIRDERS 681 00:45:36,721 --> 00:45:41,124 SET UP FEEDERS... AND PLANT NATIVE FLOWERS, 682 00:45:41,194 --> 00:45:45,463 WHICH TEND TO BE RICHER IN NECTAR. 683 00:45:45,532 --> 00:45:49,135 LATELY, THERE ARE SOME SURPRISE GUESTS 684 00:45:49,204 --> 00:45:51,138 AT THIS BANQUET. 685 00:45:56,113 --> 00:46:00,415 BANDING DATA REVEAL THAT MIGRATION PATTERNS ARE CHANGING. 686 00:46:00,483 --> 00:46:03,519 IN THE LAST FEW DECADES, 687 00:46:03,587 --> 00:46:05,789 MORE HUMMINGBIRDS HAVE BEEN SHOWING UP 688 00:46:05,857 --> 00:46:08,192 ALONG THE EAST COAST DURING THE WINTER -- 689 00:46:08,261 --> 00:46:10,396 WHEN THEY'RE USUALLY FOUND IN MEXICO. 690 00:46:16,537 --> 00:46:19,105 VAN REMSEN IS A BIOLOGY PROFESSOR 691 00:46:19,174 --> 00:46:21,275 AT LOUISIANA STATE UNIVERSITY. 692 00:46:21,343 --> 00:46:23,477 Remsen: WHEN I FIRST GOT HERE, 693 00:46:23,546 --> 00:46:26,514 ANY HUMMINGBIRD IN BATON ROUGE WAS A BIG DEAL. 694 00:46:26,583 --> 00:46:31,686 NOW, MOST PEOPLE WHO HAVE HUMMINGBIRD FEEDERS OUT 695 00:46:31,755 --> 00:46:34,523 HAVE TWO, THREE, FIVE, TEN. 696 00:46:34,592 --> 00:46:38,595 IT'S A SPECTACULAR CHANGE FROM JUST THE LATE '70s. 697 00:46:38,664 --> 00:46:42,700 Abraham: REMSEN BELIEVES THESE HUMMINGBIRDS ARE FIRST MIGRATING 698 00:46:42,770 --> 00:46:44,338 TO THE TROPICS AS USUAL, 699 00:46:44,405 --> 00:46:47,440 AND THEN VEERING NORTH AGAIN A FEW MONTHS LATER, 700 00:46:47,508 --> 00:46:49,609 TO THE GULF COAST. 701 00:46:49,678 --> 00:46:54,182 NO ONE KNOWS EXACTLY WHY. 702 00:46:54,250 --> 00:46:56,918 IT'S POSSIBLE THAT A GENETIC VARIATION 703 00:46:56,988 --> 00:47:01,623 ALTERED THE INTERNAL NAVIGATING SYSTEM IN A FEW BIRDS, 704 00:47:01,692 --> 00:47:05,128 CAUSING THEM TO CHANGE THEIR ROUTE. 705 00:47:13,774 --> 00:47:16,210 SINCE THE NEW MIGRATION PATTERN IS REWARDED WITH FOOD, 706 00:47:16,278 --> 00:47:20,047 THE VARIATION IS PASSED ON TO NEW GENERATIONS. 707 00:47:23,487 --> 00:47:25,988 Remsen: BUILT INTO HUMMINGBIRD BIOLOGY 708 00:47:26,056 --> 00:47:28,424 IS THIS ABILITY TO TRACK RESOURCES. 709 00:47:28,493 --> 00:47:30,327 THEY CAN ADAPT TO NEW SITUATIONS. 710 00:47:30,396 --> 00:47:31,595 I MEAN, THEY HAVE ADDED 711 00:47:31,663 --> 00:47:33,563 THE GULF COAST OF THE UNITED STATES 712 00:47:33,632 --> 00:47:35,199 TO THE WINTERING RANGE. 713 00:47:35,267 --> 00:47:38,802 AND WE'RE NOT TALKING ABOUT JUST A FEW INDIVIDUALS -- 714 00:47:38,871 --> 00:47:40,805 THERE ARE PROBABLY HUNDREDS AND HUNDREDS, 715 00:47:40,874 --> 00:47:43,343 MAYBE SEVERAL THOUSAND HUMMINGBIRDS OF SEVERAL SPECIES 716 00:47:43,412 --> 00:47:45,779 THAT HAVE ADDED THIS PIECE OF REAL ESTATE 717 00:47:45,847 --> 00:47:48,582 TO THEIR WINTER RANGE, COME BACK YEAR AFTER YEAR. 718 00:47:48,651 --> 00:47:51,852 VERY FLEXIBLE. 719 00:47:51,921 --> 00:47:56,824 Abraham: THAT FLEXIBILITY IS A HUMMINGBIRD HALLMARK, 720 00:47:56,894 --> 00:48:00,130 AND A KEY TO THEIR SURVIVAL. 721 00:48:00,199 --> 00:48:04,035 BUT TODAY, MANY OF THE NEARLY 350 SPECIES OF HUMMINGBIRDS 722 00:48:04,104 --> 00:48:06,171 ARE THREATENED OR ENDANGERED, 723 00:48:06,238 --> 00:48:09,574 AS THEY LOSE THEIR HABITATS AND FOOD SOURCES. 724 00:48:09,642 --> 00:48:13,812 LUCKILY, THEY ARE FINDING CHAMPIONS -- 725 00:48:13,882 --> 00:48:16,184 IN SURPRISING PLACES. 726 00:48:16,251 --> 00:48:22,655 A FEW YEARS AGO, A GROUP OF EUROPEAN BIRDERS 727 00:48:22,725 --> 00:48:25,660 JOURNEYED TO THE HIGHLAND FORESTS OF NORTHEASTERN PERU, 728 00:48:25,729 --> 00:48:30,100 HOPING FOR A GLIMPSE OF ONE OF THE WORLD'S RAREST HUMMINGBIRDS. 729 00:48:30,168 --> 00:48:34,638 TO FIND IT, THEY ENLISTED THE HELP OF A LOCAL FARMER 730 00:48:34,708 --> 00:48:36,809 NAMED SANTOS MONTENEGRO. 731 00:48:36,876 --> 00:48:40,312 [ MONTENEGRO SPEAKING SPANISH ] 732 00:48:46,455 --> 00:48:48,022 Abraham: GUIDED BY SANTOS, 733 00:48:48,091 --> 00:48:51,893 THE BIRDERS WERE ABLE TO WITNESS SOMETHING SEEN BY FEW OUTSIDERS, 734 00:48:51,962 --> 00:48:56,031 AND ONLY RECENTLY FILMED FOR THE FIRST TIME. 735 00:49:01,140 --> 00:49:04,742 THE BIRD IS THE MARVELLOUS SPATULETAIL, 736 00:49:04,811 --> 00:49:08,781 AND IT IS TRULY A MARVEL. 737 00:49:10,817 --> 00:49:12,485 THE MALE USES HIS TWO 738 00:49:12,554 --> 00:49:15,822 SPECIALLY MODIFIED TAIL FEATHERS IN AN EXTRAORDINARY DISPLAY. 739 00:49:20,764 --> 00:49:25,600 TO IMPRESS A FEMALE, HE TWIRLS HIS FEATHERS, 740 00:49:25,670 --> 00:49:27,504 LIKE A COWBOY DOING ROPE TRICKS. 741 00:49:27,572 --> 00:49:33,743 [ CLICKING AND BUZZING ] 742 00:49:33,813 --> 00:49:37,983 NO ONE HAS FIGURED OUT HOW HE MAKES THAT SOUND. 743 00:49:38,052 --> 00:49:43,722 THERE ARE FEWER THAN A THOUSAND OF HIS KIND LEFT, 744 00:49:43,792 --> 00:49:46,927 AND MOST OF THEM ARE FOUND ON THE EASTERN SLOPES 745 00:49:46,996 --> 00:49:49,631 OF A SINGLE RIVER VALLEY IN PERU. 746 00:49:57,242 --> 00:49:59,310 SURVIVAL IN THIS REGION 747 00:49:59,378 --> 00:50:03,348 IS DIFFICULT FOR HUMMINGBIRDS, AND FOR PEOPLE, TOO. 748 00:50:03,417 --> 00:50:06,018 THE VILLAGERS MAKE THEIR LIVING 749 00:50:06,087 --> 00:50:09,389 BY GROWING SUGAR CANE ON THE HILLSIDES. 750 00:50:09,458 --> 00:50:11,192 AS FARMING ENCROACHES ON 751 00:50:11,260 --> 00:50:14,060 THE MARVELLOUS SPATULETAIL'S HABITAT, 752 00:50:14,129 --> 00:50:18,333 THE BIRD IS FACING EXTINCTION. 753 00:50:18,401 --> 00:50:25,107 SANTOS MONTENEGRO HAS BECOME THE MARVELLOUS SPATULETAIL'S 754 00:50:25,176 --> 00:50:28,679 AMBASSADOR -- AND ITS PROTECTOR. 755 00:50:28,748 --> 00:50:30,681 [ MONTENEGRO SPEAKING SPANISH ] 756 00:50:54,212 --> 00:50:57,047 Abraham: SANTOS HAS PERSUADED MANY OF HIS NEIGHBORS 757 00:50:57,116 --> 00:51:00,386 THAT ECOTOURISM IS A MORE REWARDING USE OF THEIR LAND 758 00:51:00,454 --> 00:51:04,490 THAN FARMING. 759 00:51:04,558 --> 00:51:06,959 THE SPATULETAIL RESERVE WAS ESTABLISHED 760 00:51:07,028 --> 00:51:08,529 TO SAVE A SINGLE SPECIES, 761 00:51:08,597 --> 00:51:11,299 BUT IT WILL ALSO PROTECT AN ENTIRE ECOSYSTEM. 762 00:51:11,367 --> 00:51:14,670 SUCH IS THE HUMMINGBIRD'S POWER -- 763 00:51:14,738 --> 00:51:18,807 AND ITS POWERFUL HOLD UPON US. 764 00:51:26,319 --> 00:51:29,086 WHEREVER HUMMINGBIRDS FLY... 765 00:51:29,155 --> 00:51:31,123 THERE HE GOES! 766 00:51:31,192 --> 00:51:33,092 PEOPLE FLOCK TO SEE THEM. 767 00:51:35,530 --> 00:51:39,733 AND IS IT ANY WONDER? 768 00:51:43,206 --> 00:51:47,976 THESE LITTLE BIRDS HAVE CONQUERED THE AIR 769 00:51:48,046 --> 00:51:50,513 AND MASTERED THE ART OF SURVIVAL. 770 00:51:55,488 --> 00:51:59,224 HUMMINGBIRDS ARE MORE THAN JUST BEAUTIFUL -- 771 00:51:59,292 --> 00:52:01,594 THEY ARE BRILLIANT. 772 00:52:02,000 --> 00:52:05,126 Best watched using Open Subtitles MKV Player 59657

Can't find what you're looking for?
Get subtitles in any language from opensubtitles.com, and translate them here.