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Hi, I'm bill pullman.
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00:00:03,537 --> 00:00:05,045
The film you're about to see
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00:00:05,122 --> 00:00:08,457
Reveals a side of yellowstone
that few appreciate,
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00:00:08,467 --> 00:00:12,377
Soaring over the park
with a bird's-eye view.
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00:00:12,388 --> 00:00:14,638
In the shadow
of bison and bears,
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00:00:14,715 --> 00:00:17,641
Birds live a complex
and fascinating life
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00:00:17,718 --> 00:00:20,635
In all of yellowstone's
habitats.
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00:00:20,646 --> 00:00:23,388
There's a family of ospreys
nesting hundreds of feet up
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00:00:23,399 --> 00:00:25,891
On a tiny column of rock
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00:00:25,901 --> 00:00:28,318
Overlooking
the yellowstone falls.
11
00:00:28,395 --> 00:00:30,404
There's a moment when the chicks
are ready to take off
12
00:00:30,481 --> 00:00:32,239
For their first flight.
13
00:00:32,316 --> 00:00:35,492
It's a rare glimpse
of the drama that plays out
14
00:00:35,569 --> 00:00:37,828
In nests hidden
all over the park.
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00:00:37,905 --> 00:00:41,415
This is the story of
yellowstone's birds,
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00:00:41,492 --> 00:00:44,418
Life on the wing.
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00:00:44,495 --> 00:00:47,329
♪
18
00:00:47,339 --> 00:00:50,332
It's home to birds
of every feather...
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00:00:50,342 --> 00:00:51,675
[thrumming]
20
00:00:53,220 --> 00:00:55,345
[chirping]
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00:00:55,422 --> 00:00:58,307
Drawn to its wildest reaches.
22
00:01:00,603 --> 00:01:03,479
Hunters patrol the canyons.
23
00:01:08,235 --> 00:01:11,653
Protectors stand guard
in the wetlands.
24
00:01:12,856 --> 00:01:14,573
[croaking and chirping]
25
00:01:15,692 --> 00:01:19,203
Providers toil in the forests.
26
00:01:22,041 --> 00:01:25,918
These are the wings
that soar over yellowstone...
27
00:01:31,625 --> 00:01:34,968
Gathering from distant horizons
28
00:01:35,045 --> 00:01:38,722
To make the most of summer's
brief abundance.
29
00:01:38,799 --> 00:01:44,144
♪
30
00:01:44,355 --> 00:01:46,563
[chirping]
31
00:01:49,276 --> 00:01:51,777
They must survive
among giants...
32
00:01:55,574 --> 00:01:59,076
In a place where winter
is never far away.
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00:01:59,153 --> 00:02:03,247
♪
34
00:02:03,323 --> 00:02:06,917
A single purpose
drives them on--
35
00:02:06,994 --> 00:02:10,003
An urgent need
they must fulfill.
36
00:02:10,080 --> 00:02:12,497
[screeching]
37
00:02:12,508 --> 00:02:17,252
To seize opportunity
in the season of plenty
38
00:02:17,263 --> 00:02:20,639
And give flight
to the next generation.
39
00:02:24,178 --> 00:02:34,194
♪
40
00:02:34,271 --> 00:02:37,698
[chirping]
41
00:02:40,202 --> 00:02:44,788
[squawking]
42
00:02:47,626 --> 00:02:49,835
A winter morning in yellowstone.
43
00:02:52,206 --> 00:02:54,047
Warmth and color are gone.
44
00:03:00,380 --> 00:03:04,057
But a single song fills the air.
45
00:03:04,134 --> 00:03:08,604
[twittering]
46
00:03:12,392 --> 00:03:14,985
Wearing tiny slippers of ice,
47
00:03:15,062 --> 00:03:18,780
The dipper is undeterred
by subzero temperatures.
48
00:03:22,569 --> 00:03:24,328
Rapids on the yellowstone river
49
00:03:24,404 --> 00:03:27,372
Have frozen into
a slippery staircase.
50
00:03:30,836 --> 00:03:34,004
Perfect hunting grounds
for the dipper.
51
00:03:34,081 --> 00:03:44,756
♪
52
00:03:44,767 --> 00:03:48,510
North america's
only truly aquatic songbird
53
00:03:48,520 --> 00:03:50,270
Dives beneath the ice
54
00:03:50,356 --> 00:03:55,776
In search of insect larvae
hiding on the rocky river bed.
55
00:03:55,852 --> 00:03:59,279
Its waterproof feathers
protect a downy coat
56
00:03:59,365 --> 00:04:02,824
As it probes under pebbles
in the swift current.
57
00:04:05,955 --> 00:04:10,791
♪
58
00:04:10,867 --> 00:04:14,920
Few birds remain in yellowstone
through the bitter winter.
59
00:04:17,549 --> 00:04:21,710
Resident bald eagles
are resourceful scavengers,
60
00:04:21,720 --> 00:04:24,846
Flying vast distances
in search of meals.
61
00:04:28,560 --> 00:04:31,311
Ravens track wolves,
62
00:04:31,480 --> 00:04:33,272
Looting their kills.
63
00:04:35,734 --> 00:04:40,070
And alone on this
tiny stretch of open water,
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00:04:40,147 --> 00:04:42,990
The dipper thrives
among the ice.
65
00:04:46,570 --> 00:04:50,330
But soon its solitary winter
on the river
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00:04:50,416 --> 00:04:51,990
Will come to an end.
67
00:04:52,001 --> 00:05:01,916
♪
68
00:05:01,927 --> 00:05:03,760
[honk honk]
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00:05:07,341 --> 00:05:10,183
[chirping]
70
00:05:11,603 --> 00:05:13,854
As the days grow longer,
71
00:05:13,930 --> 00:05:17,357
A chorus gradually returns
to yellowstone.
72
00:05:17,434 --> 00:05:31,371
[birds calling]
73
00:05:31,540 --> 00:05:34,207
Spring is the season
of arrival...
74
00:05:37,120 --> 00:05:40,047
[honking]
75
00:05:40,123 --> 00:05:41,965
Of emergence...
76
00:05:44,553 --> 00:05:47,387
[chirping]
77
00:05:47,598 --> 00:05:49,765
[honking]
78
00:05:51,810 --> 00:05:54,686
A concert of new life.
79
00:05:55,639 --> 00:05:57,397
[trilling]
80
00:05:57,474 --> 00:06:00,225
[squawking]
81
00:06:00,235 --> 00:06:05,405
Rising above it all
is an unmistakable sound.
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00:06:05,482 --> 00:06:12,245
[warbling]
83
00:06:12,322 --> 00:06:14,656
A pair of sandhill cranes,
84
00:06:14,666 --> 00:06:16,157
Early migrants
85
00:06:16,168 --> 00:06:19,002
From their winter range
in the southwest.
86
00:06:19,079 --> 00:06:20,495
[warbling]
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00:06:20,506 --> 00:06:24,424
They've landed
in grizzly territory
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00:06:24,510 --> 00:06:26,426
In a high alpine meadow.
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00:06:27,587 --> 00:06:29,921
They must be cautious,
90
00:06:29,932 --> 00:06:32,265
But they don't
have time to waste.
91
00:06:33,927 --> 00:06:35,760
They're here to take advantage
92
00:06:35,771 --> 00:06:40,440
Of yellowstone's
brief season of abundance--
93
00:06:40,517 --> 00:06:42,359
A race...
94
00:06:42,436 --> 00:06:46,321
To breed and rear their young
before the cold returns.
95
00:06:54,030 --> 00:06:59,126
Each spring, the sandhill cranes
revive their courtship.
96
00:06:59,202 --> 00:07:02,796
[warbling]
97
00:07:02,873 --> 00:07:04,464
A dance.
98
00:07:04,591 --> 00:07:06,675
[bear groans]
99
00:07:09,805 --> 00:07:12,431
They coordinate
their movements...
100
00:07:14,551 --> 00:07:15,475
[warbling]
101
00:07:15,561 --> 00:07:17,477
And call in unison.
102
00:07:17,554 --> 00:07:19,688
[warbling]
103
00:07:23,610 --> 00:07:28,280
She tilts her bill skyward
in signal of readiness...
104
00:07:29,649 --> 00:07:30,899
[warbles]
105
00:07:30,909 --> 00:07:34,068
And the cranes
renew their union.
106
00:07:34,079 --> 00:07:39,791
[warbling]
107
00:07:42,087 --> 00:07:45,246
Now they can begin
their search for a home.
108
00:07:45,257 --> 00:07:49,259
The ground nesters
will seek a secluded wetland,
109
00:07:49,336 --> 00:07:52,429
Out of the way
of curious onlookers
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00:07:52,506 --> 00:07:53,922
And potential predators.
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00:07:53,932 --> 00:08:07,352
♪
112
00:08:07,362 --> 00:08:11,239
For sandhills,
a mate is a partner for life.
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00:08:13,527 --> 00:08:14,784
But for others,
114
00:08:14,861 --> 00:08:17,996
Coupling can be a quick
and dramatic affair.
115
00:08:20,617 --> 00:08:24,211
Just outside of yellowstone's
western boundary,
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00:08:24,287 --> 00:08:28,965
A remote valley opens up to
a vast expanse of sage meadows.
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00:08:29,042 --> 00:08:40,218
♪
118
00:08:40,229 --> 00:08:49,227
♪
119
00:08:49,238 --> 00:08:55,909
[thrumming]
120
00:08:55,986 --> 00:08:58,495
An intriguing sound
121
00:08:58,572 --> 00:09:01,665
Draws a female sage grouse
to a spring gathering.
122
00:09:06,830 --> 00:09:10,415
And she's not the only one
who hears it.
123
00:09:10,425 --> 00:09:14,836
All across the meadow,
hens are converging on a lek,
124
00:09:14,846 --> 00:09:17,973
A stage where males
display their wares.
125
00:09:19,092 --> 00:09:22,018
The hen peruses the offerings,
126
00:09:22,095 --> 00:09:24,604
Judging every detail.
127
00:09:24,681 --> 00:09:28,608
A fancy fan of tail feathers...
128
00:09:28,694 --> 00:09:31,611
Bright yellow eye-combs...
129
00:09:31,697 --> 00:09:33,488
Erect plumage...
130
00:09:35,617 --> 00:09:38,618
A large breast pouch.
131
00:09:38,695 --> 00:09:43,290
But most important to the hen
is the sound.
132
00:09:43,366 --> 00:09:47,627
A courting call
produced from his air sac,
133
00:09:47,704 --> 00:09:49,537
Which he fills
134
00:09:49,548 --> 00:09:51,047
And flaunts.
135
00:09:51,124 --> 00:09:55,635
His elaborate display
attracts her interest.
136
00:09:55,712 --> 00:09:58,471
But the morning is young.
137
00:09:58,548 --> 00:10:01,891
And the field
is full of prospects.
138
00:10:03,053 --> 00:10:05,478
She continues her review.
139
00:10:07,557 --> 00:10:10,642
In choosing the showiest males,
140
00:10:10,652 --> 00:10:12,235
Female sage grouse select traits
141
00:10:12,312 --> 00:10:14,821
That are useful
only in courtship.
142
00:10:17,567 --> 00:10:21,328
Bright decorations
and ungainly pouches
143
00:10:21,404 --> 00:10:24,331
Are a disadvantage
in a world of predators.
144
00:10:29,746 --> 00:10:33,247
By surviving
in spite of these burdens,
145
00:10:33,258 --> 00:10:37,218
A male proves that he has
strong genes to pass on.
146
00:10:39,005 --> 00:10:41,181
And the hen takes note.
147
00:10:41,257 --> 00:10:48,763
♪
148
00:10:48,774 --> 00:10:52,651
[thrumming]
149
00:10:57,032 --> 00:10:59,074
She makes her selection.
150
00:11:07,450 --> 00:11:10,960
But the male is wrapped up
in his performance.
151
00:11:12,706 --> 00:11:14,798
He keeps on strutting.
152
00:11:17,719 --> 00:11:20,679
And someone else
catches her eye.
153
00:11:23,475 --> 00:11:25,475
A rival,
154
00:11:25,552 --> 00:11:27,185
Ready to compete.
155
00:11:30,974 --> 00:11:33,483
The standoff begins
with posturing.
156
00:11:33,560 --> 00:11:36,644
[clucking]
157
00:11:36,655 --> 00:11:38,947
The males size each other up.
158
00:11:40,575 --> 00:11:42,826
It's an even match.
159
00:11:44,579 --> 00:11:49,490
And backing down now would mean
losing the chance to breed.
160
00:11:49,501 --> 00:12:04,097
♪
161
00:12:04,174 --> 00:12:09,343
♪
162
00:12:09,354 --> 00:12:11,429
[clucking]
163
00:12:11,440 --> 00:12:19,520
♪
164
00:12:19,531 --> 00:12:22,782
The rival claims
a beak full of feathers,
165
00:12:22,859 --> 00:12:26,110
And with it, victory.
166
00:12:26,121 --> 00:12:28,830
His opponent loses his chance.
167
00:12:31,543 --> 00:12:35,620
The winner briefly serves
his only purpose,
168
00:12:35,630 --> 00:12:39,123
Passing his superior strengths
to their offspring.
169
00:12:39,134 --> 00:12:42,927
But the female sage grouse
will raise them alone.
170
00:12:47,142 --> 00:12:51,394
Late spring warms
yellowstone's high country,
171
00:12:51,471 --> 00:12:55,231
Melting the snowpack
and revealing fields of green.
172
00:12:55,308 --> 00:13:05,900
♪
173
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Billions of gallons of water
drain into yellowstone lake
174
00:13:11,166 --> 00:13:13,082
And pour over the falls.
175
00:13:16,746 --> 00:13:18,838
In a matter of weeks,
176
00:13:18,915 --> 00:13:23,802
The yellowstone river surges
to 25 times its winter flow.
177
00:13:25,347 --> 00:13:28,807
The annual spring flood
is underway.
178
00:13:30,343 --> 00:13:33,895
The dipper's hunting grounds
are transformed.
179
00:13:35,357 --> 00:13:38,266
[chirping]
180
00:13:38,276 --> 00:13:42,019
And new neighbors have moved in.
181
00:13:42,030 --> 00:13:44,197
Harlequin ducks.
182
00:13:52,374 --> 00:13:54,874
[quacking]
183
00:13:54,960 --> 00:13:56,200
Like the dippers,
184
00:13:56,211 --> 00:13:58,286
Harlequin ducks
avoid competition
185
00:13:58,296 --> 00:14:03,624
By exploiting a place
few others can--
186
00:14:03,635 --> 00:14:05,593
The whitewater.
187
00:14:10,809 --> 00:14:12,892
Beneath the raging rapids,
188
00:14:12,978 --> 00:14:16,888
Aquatic insects grow large
in the oxygenated waters.
189
00:14:16,898 --> 00:14:28,908
♪
190
00:14:28,985 --> 00:14:30,410
The ducks have arrived
191
00:14:30,486 --> 00:14:33,162
From wintering grounds
on the pacific coast.
192
00:14:35,074 --> 00:14:38,501
Lifelong partners
are preparing to breed.
193
00:14:43,499 --> 00:14:45,842
But some ducks have no mates.
194
00:14:47,345 --> 00:14:50,680
The paired harlequins
must be watchful.
195
00:14:53,676 --> 00:14:55,810
[calling]
196
00:14:57,931 --> 00:14:59,939
In the chaos of the rapids,
197
00:15:00,025 --> 00:15:03,526
Bachelor males test the strength
of the established couple.
198
00:15:10,285 --> 00:15:12,201
They rush the female,
199
00:15:12,278 --> 00:15:14,746
Working to separate her
from her mate.
200
00:15:16,449 --> 00:15:19,283
The male must
drive away intruders
201
00:15:19,294 --> 00:15:20,960
While guarding his partner.
202
00:15:21,087 --> 00:15:30,970
♪
203
00:15:31,047 --> 00:15:32,972
[chirping]
204
00:15:33,049 --> 00:15:41,147
♪
205
00:15:41,224 --> 00:15:45,151
Together, they ward off
constant attacks
206
00:15:45,228 --> 00:15:47,570
Until they successfully breed.
207
00:15:47,647 --> 00:15:49,781
[calling]
208
00:15:58,658 --> 00:16:03,169
[twittering]
209
00:16:05,248 --> 00:16:08,091
The rituals of spring
in yellowstone
210
00:16:08,167 --> 00:16:10,009
Unfold in a steady rhythm.
211
00:16:10,178 --> 00:16:16,182
[thunder]
212
00:16:16,259 --> 00:16:20,478
But the season here
is anything but predictable.
213
00:16:25,777 --> 00:16:29,028
Everything can change
in a moment.
214
00:16:33,034 --> 00:16:34,534
[calling]
215
00:16:34,610 --> 00:16:37,036
More than half
of yellowstone's wetlands
216
00:16:37,205 --> 00:16:38,621
Are seasonal.
217
00:16:39,949 --> 00:16:41,207
[geese honking]
218
00:16:41,284 --> 00:16:43,042
They fill with spring melt,
219
00:16:43,169 --> 00:16:44,961
Then vanish in the summer heat.
220
00:16:47,632 --> 00:16:51,050
As these ephemeral marshes
come to life,
221
00:16:51,136 --> 00:16:54,887
They provide pockets of habitat
for the returning birds.
222
00:17:00,812 --> 00:17:03,888
Using last year's reeds
and sedges,
223
00:17:03,898 --> 00:17:06,274
The sandhill cranes
have built a nest.
224
00:17:07,819 --> 00:17:11,562
A moat of water
protects their site.
225
00:17:11,573 --> 00:17:16,200
But the marsh offers no shelter
from the sudden spring snow.
226
00:17:18,413 --> 00:17:21,655
The parents-to-be take shifts,
227
00:17:21,666 --> 00:17:24,500
Guarding two
temperature-sensitive eggs.
228
00:17:26,746 --> 00:17:29,497
They must trade posts quickly.
229
00:17:29,507 --> 00:17:32,508
The warmth of their bodies
will give the eggs
230
00:17:32,585 --> 00:17:36,095
Their only chance
of surviving the blizzard.
231
00:17:36,172 --> 00:17:44,512
♪
232
00:17:44,522 --> 00:17:48,691
Birds that lay their eggs early
give their chicks a head start.
233
00:17:50,195 --> 00:17:53,446
But they must commit to enduring
the late spring storms,
234
00:17:53,523 --> 00:17:55,114
Or lose everything.
235
00:17:55,325 --> 00:17:57,533
[warbling]
236
00:17:57,610 --> 00:18:07,952
♪
237
00:18:07,962 --> 00:18:18,971
♪
238
00:18:19,048 --> 00:18:22,049
As the snowfall accumulates,
239
00:18:22,060 --> 00:18:23,851
Mammals continue to move.
240
00:18:25,221 --> 00:18:27,897
Bison push toward
summer pasture.
241
00:18:31,894 --> 00:18:33,561
Grizzlies forage,
242
00:18:33,571 --> 00:18:36,656
Making up for calories lost
during hibernation.
243
00:18:39,160 --> 00:18:42,829
But the birds are bound
to the nest as guardians...
244
00:18:45,241 --> 00:18:47,792
Buried by responsibility.
245
00:18:52,507 --> 00:18:54,423
Exposed in the storm,
246
00:18:54,500 --> 00:18:58,469
An empty nest balances
on a pillar of stone.
247
00:19:03,601 --> 00:19:06,769
Perched hundreds of feet
above the river,
248
00:19:06,846 --> 00:19:10,189
It's buffeted by the wind
that howls through the canyon
249
00:19:10,275 --> 00:19:14,235
At the base of yellowstone's
iconic lower falls.
250
00:19:19,284 --> 00:19:21,200
In these conditions,
251
00:19:21,277 --> 00:19:24,203
It's no place for an osprey
to keep eggs warm.
252
00:19:31,796 --> 00:19:34,213
[calling]
253
00:19:34,424 --> 00:19:37,541
But she must take a gamble.
254
00:19:37,552 --> 00:19:39,635
If she waits any longer
to breed,
255
00:19:39,712 --> 00:19:42,379
Her chicks won't have time
to grow and fledge
256
00:19:42,390 --> 00:19:44,307
Before their fall migration.
257
00:19:44,383 --> 00:19:47,468
[calling]
258
00:19:47,478 --> 00:19:50,313
So, in spite of the blizzard,
259
00:19:50,389 --> 00:19:53,566
She calls in her mate.
260
00:19:53,643 --> 00:19:56,060
♪
261
00:19:56,070 --> 00:19:57,236
[chirp]
262
00:19:57,313 --> 00:20:06,070
♪
263
00:20:06,080 --> 00:20:12,084
[chirping]
264
00:20:12,161 --> 00:20:13,911
♪
265
00:20:13,922 --> 00:20:15,329
This pair's legacy
266
00:20:15,340 --> 00:20:17,423
Is now at the mercy
of the elements.
267
00:20:17,500 --> 00:20:20,584
[chirping]
268
00:20:20,595 --> 00:20:24,347
For their eggs to survive,
the weather must change quickly.
269
00:20:24,423 --> 00:20:25,932
[chirping]
270
00:20:27,477 --> 00:20:30,228
And in yellowstone,
it often does.
271
00:20:34,934 --> 00:20:45,618
[thunder]
272
00:20:45,695 --> 00:20:47,611
The mountain bluebird
273
00:20:47,622 --> 00:20:50,289
Can take no chances
in the fickle spring weather.
274
00:20:50,416 --> 00:20:54,293
[thunder]
275
00:20:54,379 --> 00:21:00,132
At the edge of a forest
stands a gnarled fir tree.
276
00:21:00,209 --> 00:21:02,385
Its days are numbered.
277
00:21:02,461 --> 00:21:05,805
But still, it nurtures life.
278
00:21:08,643 --> 00:21:10,643
Its hollowed refuge
279
00:21:10,720 --> 00:21:13,980
Holds the bluebird's mate
and their eggs,
280
00:21:14,056 --> 00:21:18,484
Sheltering them
from the extremes.
281
00:21:18,561 --> 00:21:20,069
[chirping]
282
00:21:22,064 --> 00:21:25,658
After 10 days
of incubating her clutch,
283
00:21:25,735 --> 00:21:27,651
The bluebird is restless,
284
00:21:27,662 --> 00:21:31,247
And beneath her,
she feels stirrings.
285
00:21:32,325 --> 00:21:36,085
♪
286
00:21:36,162 --> 00:21:39,797
A tree is a wonderful place
to hide from the big world.
287
00:21:42,468 --> 00:21:45,970
But climbing back down
to the ground can be tricky.
288
00:21:50,343 --> 00:21:52,092
While their mother was foraging,
289
00:21:52,103 --> 00:21:58,607
Two tiny black bear cubs
hid stashed in the canopy,
290
00:21:58,684 --> 00:22:00,434
Out of the path
of aggressive grizzlies
291
00:22:00,445 --> 00:22:02,653
That roam the meadows.
292
00:22:05,441 --> 00:22:08,776
She retrieves them
when it's time to nurse.
293
00:22:08,786 --> 00:22:20,379
♪
294
00:22:20,456 --> 00:22:22,548
The bluebird summons his mate.
295
00:22:22,625 --> 00:22:25,718
[chirping]
296
00:22:25,795 --> 00:22:27,386
He delivers his gift--
297
00:22:27,555 --> 00:22:29,296
A fat caterpillar,
298
00:22:29,307 --> 00:22:31,182
The bluebird's favorite meal.
299
00:22:34,562 --> 00:22:35,394
[chirping]
300
00:22:35,563 --> 00:22:37,646
His song, sung for her,
301
00:22:37,723 --> 00:22:41,392
Reassures her that all is well
outside the nest.
302
00:22:41,402 --> 00:22:44,236
♪
303
00:22:44,313 --> 00:22:47,031
[chirping]
304
00:22:49,235 --> 00:22:52,820
80% of yellowstone
is covered in forest.
305
00:22:52,830 --> 00:22:57,908
Its edges provide both
protection and opportunity.
306
00:22:57,919 --> 00:23:03,247
♪
307
00:23:03,257 --> 00:23:04,498
[cub screeching]
308
00:23:06,001 --> 00:23:09,428
As the cubs begin to explore
the rich habitat,
309
00:23:09,514 --> 00:23:11,013
Their mother will teach them
310
00:23:11,090 --> 00:23:15,008
The resourcefulness
of the omnivore...
311
00:23:15,019 --> 00:23:17,436
[screeching]
312
00:23:17,513 --> 00:23:21,440
Seeking out meals
wherever they can be found.
313
00:23:21,517 --> 00:23:26,019
[chirping]
314
00:23:26,030 --> 00:23:31,450
All along their route,
the neighbors keep close watch.
315
00:23:31,577 --> 00:23:32,952
[squawk]
316
00:23:36,207 --> 00:23:38,449
There's a reason
the northern flicker
317
00:23:38,459 --> 00:23:43,454
Chooses a home with sturdy walls
and a very small door.
318
00:23:43,464 --> 00:23:54,465
♪
319
00:23:54,475 --> 00:23:57,476
[chirping]
320
00:23:57,562 --> 00:24:02,022
The black bear's short claws
make her an agile climber.
321
00:24:05,478 --> 00:24:09,655
[groaning]
322
00:24:09,732 --> 00:24:11,315
She can hear the flicker
323
00:24:11,325 --> 00:24:13,576
And its chicks
moving in the nest.
324
00:24:13,652 --> 00:24:17,246
[bird chirping]
325
00:24:18,491 --> 00:24:25,171
[chirping]
326
00:24:25,247 --> 00:24:29,333
But try as she might,
she can't get to them.
327
00:24:29,343 --> 00:24:32,094
The protection
of the cavity holds.
328
00:24:41,022 --> 00:24:42,354
[chirping]
329
00:24:43,766 --> 00:24:45,524
And everyone can relax.
330
00:24:45,601 --> 00:24:47,443
[calls]
331
00:24:47,520 --> 00:24:50,354
[groaning]
332
00:24:50,364 --> 00:24:55,451
[chirping]
333
00:24:55,528 --> 00:24:57,536
After two weeks of incubation,
334
00:24:57,663 --> 00:25:00,539
The baby bluebirds begin to push
against their shells.
335
00:25:00,625 --> 00:25:01,865
[chirping]
336
00:25:01,876 --> 00:25:04,543
Their mother calls
with encouragement.
337
00:25:04,754 --> 00:25:07,880
Maybe tonight
she'll meet her chicks.
338
00:25:19,969 --> 00:25:24,855
Melting snow and falling rain
have revived the marsh.
339
00:25:29,695 --> 00:25:32,229
[croaking]
340
00:25:32,240 --> 00:25:35,574
All around the crane,
the wetland wakes...
341
00:25:35,743 --> 00:25:42,581
[croaking]
342
00:25:42,658 --> 00:25:44,658
Fills with sound.
343
00:25:44,669 --> 00:25:47,586
[croaking]
344
00:25:47,672 --> 00:25:51,582
[screeching]
345
00:25:51,592 --> 00:25:53,592
[squawking]
346
00:25:53,678 --> 00:25:55,761
She's sat through the night
347
00:25:55,838 --> 00:25:58,597
And waits to be relieved
by her mate.
348
00:25:58,766 --> 00:26:03,435
[screeching]
349
00:26:03,512 --> 00:26:05,229
But he's late.
350
00:26:06,765 --> 00:26:10,484
In his approach,
he's trespassed.
351
00:26:15,441 --> 00:26:18,942
The red-wing blackbird
is fiercely territorial.
352
00:26:18,953 --> 00:26:24,373
[chirping and warbling]
353
00:26:24,450 --> 00:26:25,624
And it has backup.
354
00:26:25,835 --> 00:26:30,212
[chirping]
355
00:26:30,289 --> 00:26:39,138
♪
356
00:26:39,214 --> 00:26:43,392
When he finally arrives,
he's met with his new task.
357
00:26:43,469 --> 00:26:54,478
♪
358
00:26:54,488 --> 00:26:56,488
Parenting.
359
00:26:56,565 --> 00:27:05,489
♪
360
00:27:05,499 --> 00:27:07,499
Only hours old,
361
00:27:07,576 --> 00:27:09,668
The colt stands,
362
00:27:09,754 --> 00:27:11,962
Ready to meet its protector.
363
00:27:13,749 --> 00:27:16,917
[warbling]
364
00:27:16,927 --> 00:27:19,178
The cranes reaffirm their bond
365
00:27:19,254 --> 00:27:22,681
As they embark on this new phase
of their union...
366
00:27:22,758 --> 00:27:25,434
[warbling]
367
00:27:25,511 --> 00:27:27,895
The care of a tiny colt.
368
00:27:35,521 --> 00:27:39,114
In the nest, a second egg
hasn't yet hatched.
369
00:27:42,361 --> 00:27:46,613
But concern for the egg
is quickly pushed aside
370
00:27:46,624 --> 00:27:48,782
By more pressing danger.
371
00:27:48,793 --> 00:27:59,459
♪
372
00:27:59,470 --> 00:28:01,303
[warbling]
373
00:28:01,380 --> 00:28:05,933
A life on the ground
means a life among predators.
374
00:28:08,053 --> 00:28:11,146
The sandhill cranes
meet danger head on,
375
00:28:11,223 --> 00:28:14,733
Putting themselves between
the coyote and their nest.
376
00:28:14,810 --> 00:28:18,311
[warbling]
377
00:28:18,322 --> 00:28:21,481
But in their effort
to defend their chick,
378
00:28:21,492 --> 00:28:24,743
The parents have exposed
the colt to another threat.
379
00:28:24,912 --> 00:28:29,072
♪
380
00:28:29,083 --> 00:28:33,585
The northern harrier
courses yellowstone's marshes,
381
00:28:33,662 --> 00:28:35,754
Gliding low.
382
00:28:35,881 --> 00:28:39,091
Flightless, without shelter,
383
00:28:39,168 --> 00:28:41,418
The colt is an easy target.
384
00:28:41,429 --> 00:28:45,505
♪
385
00:28:45,516 --> 00:28:47,266
[chirping]
386
00:28:52,598 --> 00:28:53,897
[squeak]
387
00:28:55,517 --> 00:29:00,187
♪
388
00:29:00,197 --> 00:29:03,782
Today's catch is a mouse.
389
00:29:03,909 --> 00:29:05,576
The colt is spared.
390
00:29:07,872 --> 00:29:11,248
But the close call
serves as a reminder.
391
00:29:12,701 --> 00:29:15,619
The success of this family
of ground nesters
392
00:29:15,629 --> 00:29:20,040
Will require the constant
vigilance of both parents,
393
00:29:20,050 --> 00:29:23,210
Until they're ready to leave
their summer residence.
394
00:29:23,220 --> 00:29:33,053
♪
395
00:29:33,063 --> 00:29:37,065
Yellowstone national park
is no ordinary home.
396
00:29:39,320 --> 00:29:44,281
Here, an active volcano
rumbles beneath the surface.
397
00:29:49,038 --> 00:29:50,237
[hissing]
398
00:29:50,247 --> 00:29:53,323
It releases gases
and heats groundwater,
399
00:29:53,334 --> 00:29:55,584
Transforming the terrain.
400
00:29:58,422 --> 00:30:02,082
Yellowstone
is constantly in flux,
401
00:30:02,092 --> 00:30:05,594
A land reforged.
402
00:30:05,671 --> 00:30:10,307
The flow of mineral-rich waters
builds dramatic features.
403
00:30:12,511 --> 00:30:15,854
And when geothermal formations
become dormant,
404
00:30:16,065 --> 00:30:18,357
New habitats rise.
405
00:30:25,032 --> 00:30:28,617
On the vertical face
of an old hot spring,
406
00:30:28,694 --> 00:30:31,870
Dawn erupts in a frenzy.
407
00:30:32,039 --> 00:30:42,881
[chirping]
408
00:30:42,958 --> 00:30:49,888
[chirping]
409
00:30:50,057 --> 00:30:52,716
[chirping]
410
00:30:52,726 --> 00:30:55,385
Cliff swallows
migrate thousands of miles
411
00:30:55,396 --> 00:30:58,105
From wintering grounds
in south america.
412
00:31:00,309 --> 00:31:04,477
They live life on the wing,
413
00:31:04,488 --> 00:31:07,898
Visiting the ground
only when they must,
414
00:31:07,908 --> 00:31:13,912
To collect something simple
but crucial--
415
00:31:13,998 --> 00:31:15,706
Mud.
416
00:31:17,409 --> 00:31:20,669
They ferry tiny droplets
back to the cliff,
417
00:31:20,746 --> 00:31:23,839
Gradually constructing
their home for the season.
418
00:31:23,916 --> 00:31:31,171
[chirping]
419
00:31:31,181 --> 00:31:38,261
Each nest is built from
a thousand individual pellets,
420
00:31:38,272 --> 00:31:41,064
Which means a thousand trips
to the river.
421
00:31:43,110 --> 00:31:44,568
Hard work.
422
00:31:46,021 --> 00:31:48,780
But not everyone
is so industrious.
423
00:31:51,193 --> 00:31:54,077
Some will try to steal
from a neighbor.
424
00:31:55,873 --> 00:31:59,958
Leaving a nest unattended
is risky.
425
00:32:00,035 --> 00:32:02,961
Partners exchange guard duty.
426
00:32:03,172 --> 00:32:06,965
And short trips out are best.
427
00:32:07,042 --> 00:32:11,970
At this colony of swallows,
visitors lend a helping hand.
428
00:32:12,047 --> 00:32:22,806
♪
429
00:32:22,816 --> 00:32:25,475
As herds of bison move,
430
00:32:25,486 --> 00:32:27,527
They transform the landscape.
431
00:32:28,656 --> 00:32:32,658
[chirping]
432
00:32:32,734 --> 00:32:35,911
All around the cone
of the dormant spring,
433
00:32:35,988 --> 00:32:37,871
The bison churn the earth.
434
00:32:40,575 --> 00:32:42,918
[chirping]
435
00:32:42,995 --> 00:32:47,673
♪
436
00:32:47,749 --> 00:32:50,467
Even the playful calves
do their part.
437
00:32:55,265 --> 00:32:56,765
Stirring the mud...
438
00:32:56,842 --> 00:33:03,021
[chirping]
439
00:33:03,098 --> 00:33:05,190
Making a perfect mix.
440
00:33:10,105 --> 00:33:11,363
With the bison's help,
441
00:33:11,440 --> 00:33:14,032
The cliff swallows
have a shorter commute...
442
00:33:14,109 --> 00:33:17,110
[chirping]
443
00:33:17,121 --> 00:33:19,696
Which means more time for work.
444
00:33:19,707 --> 00:33:31,049
[chirping]
445
00:33:31,218 --> 00:33:34,052
The result is rapid expansion.
446
00:33:38,475 --> 00:33:40,058
Throughout the spring,
447
00:33:40,135 --> 00:33:43,979
The population of yellowstone
continues to rise.
448
00:33:44,056 --> 00:33:52,988
♪
449
00:33:53,065 --> 00:33:57,659
Just minutes after it's born,
a bison calf stands.
450
00:33:59,321 --> 00:34:03,823
In less than an hour,
it joins the herd--
451
00:34:03,834 --> 00:34:06,543
Its only defense
against predators.
452
00:34:09,590 --> 00:34:17,670
♪
453
00:34:17,681 --> 00:34:22,100
For calves, every moment
spent frisking and sparring
454
00:34:22,227 --> 00:34:23,977
Builds strength and speed...
455
00:34:28,100 --> 00:34:30,108
And makes more mud.
456
00:34:30,194 --> 00:34:41,119
♪
457
00:34:41,330 --> 00:34:44,539
♪
458
00:34:44,616 --> 00:34:47,209
The swallows'
construction project
459
00:34:47,285 --> 00:34:48,960
Lasts for about a week.
460
00:34:49,037 --> 00:34:52,631
They'll lay their eggs
even before the mud has dried.
461
00:34:56,628 --> 00:35:00,046
The work of nurturing
the next generation
462
00:35:00,057 --> 00:35:01,681
Fills the meadow...
463
00:35:04,052 --> 00:35:06,219
[groaning]
464
00:35:06,230 --> 00:35:08,396
And the skies.
465
00:35:10,058 --> 00:35:13,151
Mammals carry
nourishment with them,
466
00:35:13,278 --> 00:35:15,278
Nursing their young with milk.
467
00:35:19,243 --> 00:35:23,736
But birds must leave the nest
to gather food for their chicks.
468
00:35:23,747 --> 00:35:27,582
♪
469
00:35:27,659 --> 00:35:30,410
The eagle traces
the river corridor,
470
00:35:30,420 --> 00:35:33,088
The lifeblood
of its summer habitat.
471
00:35:35,250 --> 00:35:38,260
It scans the channel for fish,
472
00:35:38,336 --> 00:35:40,920
The banks for waterfowl.
473
00:35:40,931 --> 00:35:46,184
♪
474
00:35:46,261 --> 00:35:51,148
[chirping]
475
00:35:54,862 --> 00:35:59,072
[chirping]
476
00:36:01,326 --> 00:36:07,197
Its mate feeds hungry mouths
the last remains of a duck.
477
00:36:07,207 --> 00:36:11,209
But their appetites grow faster
than their wings.
478
00:36:11,295 --> 00:36:15,788
And hunger can turn siblings
into savage rivals.
479
00:36:15,799 --> 00:36:24,890
♪
480
00:36:24,966 --> 00:36:27,642
Hunting has become
a constant chore
481
00:36:27,719 --> 00:36:29,853
For both of the bluebirds.
482
00:36:33,558 --> 00:36:37,402
Liberated from the nest,
the female joins the pursuit.
483
00:36:39,072 --> 00:36:44,159
Six chicks require
a perpetual supply of insects.
484
00:36:48,240 --> 00:36:52,242
And each delivery
compels a separate hunt.
485
00:36:52,252 --> 00:37:04,671
♪
486
00:37:04,681 --> 00:37:07,924
♪
487
00:37:07,935 --> 00:37:15,023
[chirping]
488
00:37:15,100 --> 00:37:17,934
♪
489
00:37:17,945 --> 00:37:22,772
Together, the parents make
over a dozen trips each hour.
490
00:37:22,783 --> 00:37:25,200
[chirping]
491
00:37:25,277 --> 00:37:35,785
♪
492
00:37:35,796 --> 00:37:39,673
And the chicks grow
with remarkable speed.
493
00:37:45,380 --> 00:37:49,724
Their demand is timed perfectly
with yellowstone's supply.
494
00:37:51,386 --> 00:37:54,053
[chirping]
495
00:37:54,064 --> 00:37:55,772
[tweeting]
496
00:37:58,318 --> 00:38:00,151
At the height of summer,
497
00:38:00,228 --> 00:38:02,821
Insects are plentiful
in the meadow.
498
00:38:06,243 --> 00:38:08,827
[chirping]
499
00:38:08,903 --> 00:38:11,496
Bluebirds aren't
the only winged hunters
500
00:38:11,573 --> 00:38:13,623
Reaping the bounty.
501
00:38:18,330 --> 00:38:22,340
Dragonflies evolved
300 million years ago
502
00:38:22,417 --> 00:38:25,343
And took to the air
before any other creature.
503
00:38:25,470 --> 00:38:38,097
♪
504
00:38:38,108 --> 00:38:42,068
Four wings power the most
primitive form of flight.
505
00:38:45,532 --> 00:38:47,615
Over the millennia,
506
00:38:47,692 --> 00:38:51,411
The dragonfly has perfected
the art of the attack.
507
00:38:54,541 --> 00:38:57,617
It has 360-degree vision
508
00:38:57,627 --> 00:39:01,379
And processes images
five times faster than a human.
509
00:39:03,550 --> 00:39:05,967
Nothing escapes its attentions.
510
00:39:08,713 --> 00:39:11,181
Few can avoid its grasp.
511
00:39:12,309 --> 00:39:13,383
♪
512
00:39:13,393 --> 00:39:25,403
♪
513
00:39:25,480 --> 00:39:36,414
♪
514
00:39:36,541 --> 00:39:44,422
[fluttering]
515
00:39:44,549 --> 00:39:50,011
♪
516
00:39:50,088 --> 00:39:50,920
[chirp]
517
00:39:50,931 --> 00:39:53,431
Fed by this summer's abundance,
518
00:39:53,558 --> 00:39:55,683
The bluebird chicks have grown.
519
00:39:57,512 --> 00:39:59,437
After less than three weeks,
520
00:39:59,514 --> 00:40:01,848
They're nearly ready to fledge,
521
00:40:01,858 --> 00:40:04,934
To hunt on their own.
522
00:40:04,945 --> 00:40:08,446
Their parents encourage them
to leave quickly.
523
00:40:08,523 --> 00:40:10,448
Summer won't last forever,
524
00:40:10,534 --> 00:40:14,536
And the bluebirds are ready to
get started on batch number two.
525
00:40:16,456 --> 00:40:27,540
♪
526
00:40:27,551 --> 00:40:37,559
♪
527
00:40:37,635 --> 00:40:41,053
Deep in the grand canyon
of the yellowstone,
528
00:40:41,064 --> 00:40:44,899
The male osprey returns
to its nest empty-handed.
529
00:40:44,976 --> 00:40:47,485
♪
530
00:40:47,571 --> 00:40:52,240
[falls roaring]
531
00:40:52,317 --> 00:41:02,333
♪
532
00:41:02,335 --> 00:41:08,173
♪
533
00:41:08,249 --> 00:41:09,507
[chirping]
534
00:41:09,718 --> 00:41:11,759
Perched high above the falls,
535
00:41:11,836 --> 00:41:14,387
His family waits expectantly.
536
00:41:19,102 --> 00:41:22,595
But he has nothing to offer
the three chicks,
537
00:41:22,606 --> 00:41:24,939
Who are still far from fledging.
538
00:41:26,651 --> 00:41:30,770
[chirping]
539
00:41:30,780 --> 00:41:33,990
His mate heads off
in search of better luck.
540
00:41:35,035 --> 00:41:38,194
There are signs of trouble here.
541
00:41:38,205 --> 00:41:41,456
The youngest chick
huddles motionless
542
00:41:41,533 --> 00:41:43,541
Between its larger siblings.
543
00:41:45,620 --> 00:41:47,128
[chirping]
544
00:41:47,205 --> 00:41:52,550
When food is limited,
the youngest suffers most.
545
00:41:52,761 --> 00:41:57,463
Its survival may depend
on today's hunt.
546
00:41:57,474 --> 00:42:00,391
[chirping]
547
00:42:03,563 --> 00:42:05,813
The osprey is a specialist.
548
00:42:07,776 --> 00:42:09,984
Evolved for life on the water,
549
00:42:10,061 --> 00:42:13,696
She preys exclusively
on live fish.
550
00:42:22,499 --> 00:42:24,916
She spots her target from above
551
00:42:24,993 --> 00:42:26,751
With vision
that cuts through the glare
552
00:42:26,828 --> 00:42:28,878
On the river's surface.
553
00:42:33,593 --> 00:42:34,968
[chirping]
554
00:42:43,344 --> 00:42:44,727
[splash]
555
00:42:49,192 --> 00:42:50,683
A miss.
556
00:42:50,694 --> 00:42:53,444
But her hunt is just beginning.
557
00:42:53,521 --> 00:43:05,698
♪
558
00:43:05,709 --> 00:43:10,378
♪
559
00:43:26,855 --> 00:43:30,064
Still, she has nothing
for the chicks.
560
00:43:30,141 --> 00:43:43,828
♪
561
00:43:43,905 --> 00:43:46,572
[chirping]
562
00:43:46,583 --> 00:43:48,499
But in a quiet lake,
563
00:43:48,576 --> 00:43:51,753
Her mate has found
a better opportunity.
564
00:43:53,590 --> 00:43:58,051
Here, each summer,
trout gather to spawn.
565
00:44:06,102 --> 00:44:09,011
They're occupied
with the task at hand,
566
00:44:09,022 --> 00:44:12,098
Laying their eggs,
567
00:44:12,108 --> 00:44:15,267
And oblivious
to the osprey's approach.
568
00:44:15,278 --> 00:44:17,111
[chirping]
569
00:44:19,366 --> 00:44:20,448
[splash]
570
00:44:21,442 --> 00:44:26,120
[chirping]
571
00:44:26,197 --> 00:44:32,702
♪
572
00:44:32,712 --> 00:44:34,462
He heads for home.
573
00:44:37,792 --> 00:44:40,426
But his catch is not safe yet.
574
00:44:41,805 --> 00:44:48,476
[squawking]
575
00:44:48,553 --> 00:44:49,885
A peregrine falcon,
576
00:44:49,896 --> 00:44:51,887
The world's fastest bird,
577
00:44:51,898 --> 00:44:55,224
Is after his prize.
578
00:44:55,235 --> 00:44:58,152
Today's attack is unusual.
579
00:44:59,564 --> 00:45:02,990
Peregrines are superb hunters
on the wing,
580
00:45:03,067 --> 00:45:05,568
But they're not known
as thieves.
581
00:45:05,578 --> 00:45:11,749
♪
582
00:45:11,826 --> 00:45:16,328
[chirping]
583
00:45:16,339 --> 00:45:19,590
[squawking]
584
00:45:19,667 --> 00:45:21,759
Against the superior flier,
585
00:45:21,836 --> 00:45:28,015
The osprey has only one tactic
that might work--
586
00:45:28,092 --> 00:45:30,259
Ditching into the water,
587
00:45:30,270 --> 00:45:32,511
Where the peregrine
can't follow.
588
00:45:32,522 --> 00:45:41,520
♪
589
00:45:41,531 --> 00:45:44,699
[squawking]
590
00:45:46,870 --> 00:45:49,120
Thanks to his evasive maneuver,
591
00:45:49,197 --> 00:45:51,789
He has something to bring
his waiting chicks.
592
00:45:51,958 --> 00:46:02,291
♪
593
00:46:02,302 --> 00:46:05,011
[chirping]
594
00:46:07,381 --> 00:46:08,681
[chirp]
595
00:46:09,801 --> 00:46:19,984
[chirping]
596
00:46:20,061 --> 00:46:23,729
His mate feeds
the two larger siblings.
597
00:46:23,740 --> 00:46:25,823
But the smallest,
598
00:46:25,900 --> 00:46:27,825
Crouched
at the edge of the nest,
599
00:46:27,994 --> 00:46:29,952
Is too weak to join the feast.
600
00:46:33,500 --> 00:46:34,916
[chirping]
601
00:46:37,504 --> 00:46:40,412
At the eagle nest
on the river bend,
602
00:46:40,423 --> 00:46:43,591
Competition
is also taking a toll.
603
00:46:45,094 --> 00:46:47,845
Driven by self-preservation,
604
00:46:47,922 --> 00:46:51,766
The larger sibling
works to eliminate its rival.
605
00:46:54,679 --> 00:46:57,763
Its parent watches on,
606
00:46:57,774 --> 00:46:59,598
Unmoved to act.
607
00:46:59,609 --> 00:47:03,402
One healthy chick is better
than two going hungry.
608
00:47:05,448 --> 00:47:06,948
[chirp]
609
00:47:08,860 --> 00:47:12,578
Now the chick can take
every meal for itself.
610
00:47:19,704 --> 00:47:20,920
[chirp]
611
00:47:25,960 --> 00:47:29,461
The victor dons new plumage:
612
00:47:29,472 --> 00:47:31,973
The black feathers
of a fledgling.
613
00:47:33,217 --> 00:47:35,050
In the coming weeks,
614
00:47:35,061 --> 00:47:37,895
He'll begin testing
his strengths,
615
00:47:38,022 --> 00:47:40,022
Preparing to leave the nest.
616
00:47:42,068 --> 00:47:46,061
As summer ends,
new journeys approach.
617
00:47:46,072 --> 00:47:50,533
The sandhill chick now stands
nearly as tall as its parents.
618
00:47:52,662 --> 00:47:56,581
The urge to fly
will soon take hold.
619
00:47:56,657 --> 00:48:01,919
♪
620
00:48:02,005 --> 00:48:06,007
But for the dipper,
life will always be aquatic.
621
00:48:07,093 --> 00:48:15,266
[chirping]
622
00:48:18,429 --> 00:48:21,564
And fledging is not a matter
of taking to the air.
623
00:48:28,773 --> 00:48:30,022
The juvenile dipper,
624
00:48:30,033 --> 00:48:32,191
Distinguished by a yellow beak,
625
00:48:32,201 --> 00:48:34,285
Has just left the nest.
626
00:48:35,788 --> 00:48:38,956
It watches closely
627
00:48:39,033 --> 00:48:41,167
And tries out all the moves.
628
00:48:43,704 --> 00:48:45,338
Foraging...
629
00:48:48,051 --> 00:48:49,625
[chirp]
630
00:48:49,636 --> 00:48:50,968
Dipping...
631
00:48:51,796 --> 00:48:53,045
[chirp]
632
00:48:53,056 --> 00:48:54,630
[chirp]
633
00:48:57,468 --> 00:48:59,894
And, of course, swimming.
634
00:48:59,971 --> 00:49:12,564
♪
635
00:49:12,575 --> 00:49:16,994
♪
636
00:49:17,121 --> 00:49:19,747
Some skills you're born with.
637
00:49:21,826 --> 00:49:26,170
The juvenile dipper will be
completely independent soon.
638
00:49:30,677 --> 00:49:31,509
[squawking]
639
00:49:31,585 --> 00:49:34,220
But a meal is always welcome.
640
00:49:35,932 --> 00:49:37,848
When the young dipper is ready,
641
00:49:37,925 --> 00:49:41,593
It will move
into its own territory
642
00:49:41,604 --> 00:49:43,595
Not far away.
643
00:49:43,606 --> 00:49:45,940
Perhaps just around
the riverbend.
644
00:49:47,694 --> 00:49:51,320
But not every nest
is so easy to leave.
645
00:49:58,121 --> 00:50:00,579
A first osprey has fledged.
646
00:50:03,251 --> 00:50:06,627
Its only surviving sibling
hesitates.
647
00:50:13,636 --> 00:50:15,886
There's no room for error here.
648
00:50:21,894 --> 00:50:26,063
Cautiously,
it tests its wings in the wind.
649
00:50:26,149 --> 00:50:30,067
[chirping]
650
00:50:30,144 --> 00:50:43,748
♪
651
00:50:43,824 --> 00:50:52,256
♪
652
00:50:52,333 --> 00:50:54,333
A maiden voyage
653
00:50:54,343 --> 00:50:58,679
Over one of the greatest
landscapes on earth.
654
00:50:58,756 --> 00:51:07,104
♪
655
00:51:07,181 --> 00:51:09,273
New challenges lie ahead.
656
00:51:12,195 --> 00:51:14,945
For most of yellowstone's birds,
657
00:51:15,022 --> 00:51:16,739
A long migration.
658
00:51:17,867 --> 00:51:20,117
For the few who stay,
659
00:51:20,244 --> 00:51:21,786
Winter's hardship.
660
00:51:23,456 --> 00:51:25,623
As the summer draws to a close,
661
00:51:25,699 --> 00:51:28,084
Seasonal visitors part ways.
662
00:51:30,880 --> 00:51:34,215
But they will return
to yellowstone,
663
00:51:34,291 --> 00:51:39,128
And fill its skies
with life on wings.
664
00:51:39,138 --> 00:51:44,308
[warbling]
665
00:51:45,970 --> 00:51:48,637
It's an image
I'll hold for a lifetime--
666
00:51:48,648 --> 00:51:51,056
The position
of that osprey nest,
667
00:51:51,067 --> 00:51:52,307
Perched on a pinnacle
668
00:51:52,318 --> 00:51:55,060
Overlooking
the yellowstone falls.
669
00:51:55,071 --> 00:51:57,738
And when you continue
the journey down the river,
670
00:51:57,815 --> 00:52:00,157
You realize that
the story of yellowstone
671
00:52:00,234 --> 00:52:02,159
Doesn't end
at the park boundary.
672
00:52:02,236 --> 00:52:04,161
In the next "epic yellowstone,"
673
00:52:04,238 --> 00:52:06,905
We discover how a river
that's allowed to run free
674
00:52:06,916 --> 00:52:10,167
Carries with it
that same wild spirit.
675
00:52:10,294 --> 00:52:12,169
It's an epic journey,
676
00:52:12,380 --> 00:52:14,255
Down the river wild.51303
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