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BARRY HUMPHRIES: As the dawn breaks
across Australia,
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the marsupials go to bed.
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00:00:12,280 --> 00:00:14,400
Except for the ones that don't,
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00:00:15,040 --> 00:00:16,920
because there are exceptions
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00:00:17,040 --> 00:00:20,480
to every rule
in this land of wonders.
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And magic does not have rules.
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It has dragons...
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00:00:29,640 --> 00:00:31,240
saltwater monsters...
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and miniature dancers.
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00:00:38,560 --> 00:00:42,320
What are the extraordinary tricks
these animals have
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in response to their world?
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00:00:46,800 --> 00:00:50,240
To endure Australia's frozen peaks...
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00:00:52,120 --> 00:00:55,240
and thrive on its harsh savannas.
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To compete in its
tropical rainforests.
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Travelling into their worlds
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we begin to understand
how truly unique life is
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in the Magical Land of Oz.
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On Australia's highest peaks,
the Snowy Mountains,
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winter temperatures
reach well below zero.
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This true alpine wilderness
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can spend half the year
beneath a blanket of snow.
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Very few creatures can withstand
a winter on Australia's peaks,
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where food is scarce.
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But some tough it out.
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This echidna has hibernated
on and off
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during the coldest months,
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emerging, at the tail end of winter,
very hungry.
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00:02:32,680 --> 00:02:34,240
An insect eater,
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00:02:34,320 --> 00:02:38,880
it's slim pickings while
the snow encases his food source.
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00:02:40,120 --> 00:02:44,560
But as one of the most energy
efficient mammals on the planet -
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00:02:44,640 --> 00:02:49,040
with a body temperature that can
drop below 5 degrees Celsius -
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this echidna can survive
long periods in the bitter cold.
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His shovel-like claws
work like snowshoes.
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It's a lonely march
on an empty stomach.
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As the days get longer and warmer,
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00:03:13,280 --> 00:03:18,200
high-country rivers carry the now
liquid winter down the mountain.
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00:03:26,360 --> 00:03:30,880
Spring's arrival also means
at last the echidna can feast
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after months of winter's famine.
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But one obstacle still stands
in the way of a full belly -
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a fast-flowing one.
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00:04:01,520 --> 00:04:06,560
Using his long beak as a snorkel
and large feet as paddles,
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he's perfectly capable
of a river crossing.
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00:04:37,720 --> 00:04:41,280
He may not look like
an all-terrain vehicle,
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but the echidna inhabits
more Australian landscapes
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than any other native animal.
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He will now spend 18 hours a day
foraging for insects,
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turning over soil
and gardening the forests.
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00:05:03,400 --> 00:05:07,920
The echidna is named
after the Greek goddess Echidna,
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who was half woman and half reptile.
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00:05:12,280 --> 00:05:17,080
Its closest relative,
the world's only other monotreme,
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also has a curious blend
of characteristics.
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With splayed limbs, on land,
the platypus shuffles like a lizard.
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But in the water,
she glides like an otter.
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Egg-laying and beaked like a duck,
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she's the ultimate mash-up.
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But the combination works.
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The platypus has remained unchanged
in Australia
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for 25 million years.
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These elegant underwater hunters
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are the oldest lineage of mammals
alive on earth today,
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living only here on the rivers
of Eastern Australia.
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Later on the evolutionary tree,
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but in the same surrounding
grasslands and forests
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of modern Australia,
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are the marsupials.
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And the most familiar of them all
is the eastern grey kangaroo.
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The weight of an adult human,
but head and shoulders taller,
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this male is demonstrating
his potency to the mob.
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00:07:06,640 --> 00:07:10,880
A thick sticky secretion
from glands on his chest,
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00:07:11,400 --> 00:07:14,240
in a cocktail of fresh urine,
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says, "This is my patch."
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Just in case
anyone doubts his authority.
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He has a harem
of nine breeding females
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00:07:46,680 --> 00:07:50,000
all with at least one joey.
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00:07:55,280 --> 00:07:57,920
Despite the male's posturing,
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he's not the powerhouse of this
extraordinarily successful species.
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It's the female
with her magic pouch.
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So while this 10-month-old joey
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is starting to explore
the outside world,
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another tiny baby is already
developing in the pouch.
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It's only the size of a jellybean.
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The older joey is now being forced
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to spend more hours
outside the pouch
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to give his mum
and new sibling a break.
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Like all young ones,
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he knows to keep pestering,
until she gives in.
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00:08:58,360 --> 00:09:00,640
With only two joeys on the go,
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00:09:00,720 --> 00:09:03,960
she is now ready
to fall pregnant again...
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..a fact not lost
on the dominant male.
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He will pursue her for days.
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00:09:37,840 --> 00:09:41,360
But rival males
are a constant threat.
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00:10:25,520 --> 00:10:30,320
Maintaining his status
as top roo is so taxing
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00:10:30,400 --> 00:10:35,520
that he may only keep
the dominant male crown for a year
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00:10:35,600 --> 00:10:37,440
before he is toppled.
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Being a kangaroo is much more
complicated than it appears.
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00:10:46,920 --> 00:10:50,880
But the energy expended
on reproduction is working for them.
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Exploiting the farmlands, which have
spread across the continent,
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there are millions of eastern grey
kangaroos in Australia today.
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Large kangaroos are amongst
the very few native animals
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to benefit from land clearing
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and the decline of Australia's
apex predators.
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So many species are gone now.
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00:11:18,560 --> 00:11:22,960
The continent's top carnivore,
the Tasmanian tiger,
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00:11:23,040 --> 00:11:26,600
was hunted into extinction
by the 1930s.
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00:11:30,000 --> 00:11:32,720
And the grand hunter from the skies,
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00:11:32,800 --> 00:11:35,160
Australia's own eagle,
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has come perilously close
to being lost.
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00:11:41,000 --> 00:11:45,720
This country's wedge-tailed eagle
is one of the world's largest.
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00:11:47,480 --> 00:11:50,680
For years, it was mercilessly shot,
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mistakenly portrayed as
a prolific killer of lambs.
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In the mid 1900s,
there was a bounty on its head,
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with up to 30,000 eagles
killed in a single year,
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their great bodies
strung up on fences.
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Eagles are now protected
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and most farmers accept that they
are no threat to their livestock.
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Now affectionately
known as "wedgies",
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their calls again echo
across the farmland.
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Australia's biggest bird of prey
has a chance of a comeback,
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thanks, in part, to another mistake
of European settlers.
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Fluffy eagle fodder,
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brought here over 200 years ago,
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now in plague proportions.
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The wedge-tail is
a stunning avian predator.
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00:12:59,800 --> 00:13:02,080
For such a large bird,
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her movements are deft and light.
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00:13:10,360 --> 00:13:12,760
With a 2.5-metre wingspan,
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her precision, at speed,
is breathtaking.
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She can soar up to 2,000 metres high
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and carry half her own body weight
in her huge talons.
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00:13:34,400 --> 00:13:36,880
But as she surveys the landscape,
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those eagle eyes pick up something
curious and worth investigating.
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An eastern long-necked tortoise.
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00:13:52,240 --> 00:13:55,840
Although the tortoise has
an almost impenetrable shell,
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he's not taking his chances.
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00:13:58,400 --> 00:14:00,320
Time to retreat.
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She's sure that rock was moving.
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Baffling really.
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It's an old trick but a good one.
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The eagle resumes her search
for an easier target.
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00:14:42,840 --> 00:14:45,000
This time, it's more familiar.
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00:15:02,960 --> 00:15:04,800
In some parts of the country,
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rabbits make up 90%
of the eagle's diet.
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The tortoise, zero.
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Yet again, the tortoise
beats the hare.
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00:15:25,640 --> 00:15:29,000
And eagles now
are the farmer's friend,
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helping to keep
the rabbit population down.
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00:15:40,360 --> 00:15:43,160
Before rabbits were introduced
to Australia
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and so much native bushland
was removed,
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it was the small native animals
which had the run of the land.
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In the south-west of the country
lie the Dryandra Woodlands.
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This stand of wandoo eucalypts
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is one of the last strongholds
for a native mammal
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which once roamed
the entire continent.
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As the sun hits the carpet
of wildflowers
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and insects begin
massing on the forest floor,
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a small marsupial is making
its first move.
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The numbat...
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..closest living relative
to the extinct thylacine,
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or Tasmanian tiger,
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is on a termite hunt.
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00:17:07,800 --> 00:17:12,640
It will take 20,000 termites
to fill her belly.
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Back in her den are four rapidly
growing numbat pups,
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which she has fed through the night.
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The young are eight months old
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and only just getting curious
about life beyond the burrow.
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One of them, the smallest
and boldest, is the leader.
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She's begun to explore
the tree stump fortress
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protecting the burrow exit.
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Her siblings follow,
trembling as the air hits their fur.
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Each day our leader has inched
closer to the fortress walls.
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From here she gets a first glimpse
at the world beyond.
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But with every sound a warning,
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the pups retreat, more than advance.
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00:18:38,080 --> 00:18:40,200
They'll do well to be cautious.
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00:18:40,280 --> 00:18:45,760
Hundreds of thousands of numbats
once ranged across Australia.
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Today, there are less of them
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than the more famously endangered
snow leopard or giant panda.
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Just like the panda,
numbats are specialist feeders,
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needing something that's now
in very short supply,
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undisturbed woodland
with logs for termites.
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00:19:06,680 --> 00:19:10,040
This female can smell
a termite's gallery
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and even feels their tiny
vibrations beneath her feet.
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Using her worm-like tongue,
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she extracts them
from tricky crevices.
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00:19:25,240 --> 00:19:30,640
Each day she swallows 10%
of her own body weight.
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00:19:39,760 --> 00:19:43,000
Her young are getting braver
and revelling in the sun.
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The rounded snouts
which have suited milk feeding
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are getting more elongated
by the day.
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Within a month, they too
will be reliant on termites.
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00:20:03,040 --> 00:20:06,360
So, the job of working out
what is food and what is not
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is the lesson of the day.
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Except for one of them.
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Our little explorer
is determined to experience
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00:20:16,560 --> 00:20:18,920
what lies beyond the wall...
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00:20:21,720 --> 00:20:26,360
..while her siblings stay
cautiously close to the burrow.
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She takes off.
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00:20:52,440 --> 00:20:54,760
She will keep wandering further
from the burrow
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00:20:54,840 --> 00:21:00,680
until one day she leaves her mother's
territory and finds her own...
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..crossing paths
with other young numbats
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also emerging from hollows
in this forest.
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00:21:17,120 --> 00:21:20,560
Each one of them will need
to venture and breed
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00:21:20,640 --> 00:21:23,800
in order to keep this species viable.
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00:21:32,600 --> 00:21:34,880
Over the past two centuries,
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00:21:34,960 --> 00:21:38,960
almost all of the numbat's habitat
has been destroyed...
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00:21:41,320 --> 00:21:46,040
..apart from these last stands
of wandoo forest.
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00:21:47,680 --> 00:21:53,320
And less than 1,000 tiny numbats
are left surviving in the wild.
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00:21:56,280 --> 00:22:01,520
Where Australia's ecosystems
are left intact, animals thrive.
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It's as simple as that.
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00:22:08,680 --> 00:22:10,520
In far northern Queensland,
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00:22:10,600 --> 00:22:12,520
the rainforests of the wet tropics
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00:22:12,600 --> 00:22:16,520
appear as a thin ribbon of green
along the coast.
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00:22:20,440 --> 00:22:23,480
These rainforests
have been around longer
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00:22:23,560 --> 00:22:25,440
than any other on the planet...
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00:22:29,160 --> 00:22:33,160
..an estimated 180 million years,
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00:22:33,280 --> 00:22:36,760
far outdating the Amazon.
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00:22:39,760 --> 00:22:43,520
Australia's most secretive
and unique creatures
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have made the forests their home.
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00:22:48,840 --> 00:22:52,120
And everyone here
is competing for spoils.
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00:22:56,440 --> 00:22:59,120
Even on the forest floor.
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00:23:13,920 --> 00:23:19,200
Thousands of species of fungi
battle to dominate the leaf litter.
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00:23:23,200 --> 00:23:25,080
Despite their myriad forms,
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00:23:25,160 --> 00:23:30,240
the fungi are all engaged
in similar mycological magic.
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00:23:33,120 --> 00:23:35,960
They break down wood and leaf litter
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00:23:36,040 --> 00:23:38,960
and return their nutrients
to the soil...
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00:23:42,120 --> 00:23:45,440
..while slime moulds
hunt down the fungi
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00:23:45,520 --> 00:23:47,680
and turn them into nutrients too.
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00:23:52,080 --> 00:23:55,600
Things live fast and die young
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00:23:55,680 --> 00:23:57,960
on this forest floor.
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00:24:04,480 --> 00:24:08,120
The pioneers of recycling,
you might say,
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00:24:08,200 --> 00:24:11,440
assuming every imaginable shape.
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00:24:17,480 --> 00:24:19,600
They feed the hungry forest,
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00:24:19,680 --> 00:24:23,920
turning it into one of
the earth's evolutionary hotspots.
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00:24:28,520 --> 00:24:33,720
For it was here, in the cradle
of the Gondwana Rainforests,
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00:24:33,800 --> 00:24:37,040
that Australia's mammals
first emerged.
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00:24:41,000 --> 00:24:43,480
As the land became more arid,
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00:24:43,840 --> 00:24:46,160
many moved out to the grasslands.
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00:24:54,960 --> 00:24:57,760
But there is one kangaroo
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00:24:57,840 --> 00:25:00,920
which has never left
its rainforest home.
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00:25:06,560 --> 00:25:11,160
A shy creature rarely seen
on the forest floor.
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00:25:15,360 --> 00:25:19,400
That's because its home
is in the trees.
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00:25:32,000 --> 00:25:37,640
This young male tree kangaroo
has evolved for a life in the canopy,
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00:25:37,720 --> 00:25:40,840
with large strong arms,
big curved claws
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00:25:40,920 --> 00:25:43,160
and a pendulous tail.
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00:26:00,320 --> 00:26:06,400
But even 20 metres up,
he's still clearly a kangaroo.
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00:26:13,360 --> 00:26:16,840
The monkey of the kangaroo world,
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00:26:16,920 --> 00:26:20,600
just a little less sure footed.
247
00:26:22,080 --> 00:26:24,200
At almost two years old,
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00:26:24,280 --> 00:26:27,800
he has only recently left his mum
to find his own territory.
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00:26:30,480 --> 00:26:33,000
Unlike his relatives at ground level,
250
00:26:33,080 --> 00:26:35,560
he will live a solitary life,
251
00:26:35,640 --> 00:26:38,720
only seeking out a female
when it's time to mate.
252
00:26:38,800 --> 00:26:42,280
But he's having trouble
cutting the umbilical cord.
253
00:26:43,840 --> 00:26:48,080
He can hear his mum
in one of her favourite trees
254
00:26:48,160 --> 00:26:51,520
and he crosses the canopy roof
to reach her.
255
00:26:53,000 --> 00:26:55,040
But it's not a tender welcome.
256
00:26:57,960 --> 00:27:00,800
His mother doesn't want him near her.
257
00:27:04,120 --> 00:27:06,760
They move to opposite ends
of the tree.
258
00:27:06,840 --> 00:27:11,200
Her tough love suddenly makes sense.
259
00:27:13,040 --> 00:27:17,760
At eight months, the newest joey
has begun leaving the pouch
260
00:27:17,840 --> 00:27:20,560
and exploring her high-wire world.
261
00:27:26,520 --> 00:27:28,280
Though she's wobbly enough,
262
00:27:28,360 --> 00:27:31,840
a teenage sibling
might topple her altogether.
263
00:27:43,600 --> 00:27:44,800
For her brother,
264
00:27:44,880 --> 00:27:48,680
being solitary requires
its own process of evolution.
265
00:27:50,160 --> 00:27:52,640
At least up in this rainforest,
266
00:27:52,720 --> 00:27:55,080
he's never really lonely.
267
00:28:00,280 --> 00:28:02,280
Above and below him,
268
00:28:02,360 --> 00:28:05,000
over half of Australia's
bird species
269
00:28:05,080 --> 00:28:09,800
are in a springtime
nest-building frenzy.
270
00:28:14,480 --> 00:28:19,160
The sunbird uses bark and seeds
to build its hanging nest.
271
00:28:21,000 --> 00:28:26,440
And the fawn-breasted bowerbird
makes final artistic touches
272
00:28:26,520 --> 00:28:28,760
to its elaborate construction.
273
00:28:31,360 --> 00:28:34,920
Most cockatoos and parrots
rely on hollows.
274
00:28:36,280 --> 00:28:39,400
It would seem an easier option
than DIY.
275
00:28:41,040 --> 00:28:45,600
But relying on hollows has left
the parrot world out on a limb.
276
00:28:49,080 --> 00:28:53,280
This female eclectus parrot
has guarded her hollow
277
00:28:53,360 --> 00:28:55,480
well before she was ready to lay.
278
00:28:57,640 --> 00:29:00,920
Her green mate delivers food to her
279
00:29:01,000 --> 00:29:03,680
so she can stay on sentry duty.
280
00:29:05,480 --> 00:29:08,520
Hollows form slowly in old trees
281
00:29:08,600 --> 00:29:10,960
so there's never enough
to go around.
282
00:29:12,880 --> 00:29:15,280
Unlike so many in this forest,
283
00:29:15,360 --> 00:29:18,400
this one is too high to flood
284
00:29:18,480 --> 00:29:20,760
and it's safe from predators.
285
00:29:24,840 --> 00:29:28,000
It should be a textbook incubation.
286
00:29:29,520 --> 00:29:31,880
[COCKATOOS SQUAWK]
287
00:29:34,400 --> 00:29:36,560
But the neighbours nobody wants
288
00:29:36,640 --> 00:29:40,560
are looking to move
into this leafy suburb.
289
00:29:40,640 --> 00:29:43,560
It's the sulphur-crested cockatoo.
290
00:29:45,640 --> 00:29:47,000
[SQUAWKS]
291
00:29:51,160 --> 00:29:55,160
Famously loud, assertive
and ready to lay,
292
00:29:55,240 --> 00:29:58,520
this pair want the hollow
for themselves.
293
00:30:01,840 --> 00:30:04,320
They begin a game of intimidation.
294
00:30:09,120 --> 00:30:12,240
Unlike the cockatoos,
who can breed three times a year,
295
00:30:12,320 --> 00:30:17,200
the eclectus parrot is doing well
to raise one chick annually.
296
00:30:24,080 --> 00:30:25,480
[SQUAWKS]
297
00:30:29,520 --> 00:30:31,440
But as the day heats up,
298
00:30:31,520 --> 00:30:36,520
temperatures inside the nest
hit over 30 degrees Celsius.
299
00:30:43,960 --> 00:30:48,160
Her own body heat is raising
temperatures even further.
300
00:30:50,800 --> 00:30:52,880
Her eggs will cook in this oven.
301
00:30:59,040 --> 00:31:02,280
With the coast clear
of sulphur-crested cockatoos,
302
00:31:02,360 --> 00:31:06,520
she leaves to let the nest cool down.
303
00:31:06,600 --> 00:31:09,440
But they see an opportunity too.
304
00:31:12,120 --> 00:31:16,480
If the cockatoos get inside,
they will smash the eggs.
305
00:31:25,160 --> 00:31:28,800
The cockatoos get more confident
with every passing moment.
306
00:31:35,720 --> 00:31:37,920
[PARROT SQUAWKS]
307
00:31:38,000 --> 00:31:41,600
The female will fight to the death
to protect her eggs.
308
00:31:43,440 --> 00:31:47,640
Her siren colour is enough
to ward off these intruders.
309
00:32:03,360 --> 00:32:06,560
But colour is only one
of the many ways
310
00:32:07,040 --> 00:32:09,360
birds in this forest communicate.
311
00:32:12,040 --> 00:32:16,480
It's only recently been discovered
that 24 million years ago,
312
00:32:16,560 --> 00:32:19,720
birdsong evolved in this forest.
313
00:32:20,960 --> 00:32:24,360
It is the home of nature's
great vocalists.
314
00:32:24,440 --> 00:32:26,040
[TRILLS]
315
00:32:26,120 --> 00:32:27,600
[SQUAWKS]
316
00:32:28,800 --> 00:32:31,000
[HONKS]
317
00:32:31,080 --> 00:32:34,000
[TWEETS]
318
00:32:36,120 --> 00:32:41,800
It's also where one cockatoo
has developed a sound so unique,
319
00:32:41,880 --> 00:32:45,120
it wasn't thought possible
for a bird.
320
00:32:52,000 --> 00:32:54,800
The continent's largest cockatoo,
321
00:32:54,880 --> 00:32:57,960
the palm cockatoo or "palmy".
322
00:33:00,280 --> 00:33:02,400
It's the most intelligent
of Australia's,
323
00:33:02,480 --> 00:33:04,920
and possibly the world's,
bird species.
324
00:33:06,600 --> 00:33:10,000
Its brain is comparable,
in brain-to-body ratio,
325
00:33:10,080 --> 00:33:12,960
to that of a dolphin or great ape.
326
00:33:13,040 --> 00:33:15,520
But it's also a parrot,
327
00:33:15,600 --> 00:33:17,440
and like its relatives,
328
00:33:17,520 --> 00:33:19,960
the palmy nests in tree hollows.
329
00:33:24,440 --> 00:33:28,480
This proud pair have secured
a beautiful bough.
330
00:33:30,040 --> 00:33:33,160
And for their entire lifespans,
around 60 years,
331
00:33:33,240 --> 00:33:35,320
they will share the parenting.
332
00:33:39,720 --> 00:33:42,800
They pass the baton with a kiss...
333
00:33:46,960 --> 00:33:50,320
..before taking turns to forage.
334
00:33:56,840 --> 00:34:01,520
These birds and this forest
have evolved together.
335
00:34:02,680 --> 00:34:05,040
With one of the world's
largest beaks,
336
00:34:05,120 --> 00:34:09,080
they are amongst the few creatures
able to break into the hard fruits
337
00:34:09,159 --> 00:34:11,880
of the native nonda plum.
338
00:34:29,480 --> 00:34:34,120
As the female returns to the nest,
she offers a distinct knock...
339
00:34:34,199 --> 00:34:35,800
[KNOCKS]
340
00:34:37,560 --> 00:34:40,080
..to say, "Yoo-hoo! It's me."
341
00:34:44,679 --> 00:34:49,320
But it is her mate who works harder
still to message his partner...
342
00:34:52,520 --> 00:34:58,840
..communicating in a way no bird -
indeed, no other animal on earth -
343
00:34:58,920 --> 00:34:59,960
has accomplished.
344
00:35:11,880 --> 00:35:18,000
This male palmy has a talent long
thought exclusively a human skill.
345
00:35:23,000 --> 00:35:26,120
He fashions a drumstick
346
00:35:26,200 --> 00:35:29,960
and very deliberately makes music!
347
00:35:37,160 --> 00:35:41,880
Each male produces regular beats
to his own particular rhythm.
348
00:35:43,280 --> 00:35:44,320
[SQUAWKS]
349
00:35:44,400 --> 00:35:47,680
Why he does this is still unclear.
350
00:35:47,760 --> 00:35:50,520
Is it a show of strength
to ward off competitors?
351
00:35:50,600 --> 00:35:51,800
[SQUAWKS]
352
00:35:51,880 --> 00:35:56,280
Or a message to his partner
that she needs to look no further?
353
00:35:56,360 --> 00:35:59,600
He and his nest are best.
354
00:36:04,160 --> 00:36:08,800
A feature of Australia's tropical
rainforests is their stability.
355
00:36:12,240 --> 00:36:17,240
But the monsoon region to the west
is volatile and unpredictable.
356
00:36:17,320 --> 00:36:22,280
Here, the land seesaws
between two extremes -
357
00:36:22,360 --> 00:36:27,120
the floods
of the summer's wet season...
358
00:36:29,400 --> 00:36:32,360
..and the raging fires
which can take hold,
359
00:36:32,440 --> 00:36:36,720
burning for months
through the region's parched winters.
360
00:36:40,280 --> 00:36:42,440
But it's these extremes
361
00:36:42,520 --> 00:36:47,600
which have helped sculpt some of
the world's most dramatic landscapes.
362
00:36:51,920 --> 00:36:54,200
One of the largest savannas on earth,
363
00:36:54,280 --> 00:36:58,360
sweeping across
one quarter of the continent,
364
00:36:58,440 --> 00:37:02,880
intersected by
permanent tidal rivers.
365
00:37:08,000 --> 00:37:11,000
[BIRDS AND INSECTS CALL AND CHIRRUP]
366
00:37:26,880 --> 00:37:31,880
The hunting ground
of the saltwater croc.
367
00:37:37,040 --> 00:37:42,000
This male, known to the river guides
as Casanova,
368
00:37:42,080 --> 00:37:45,680
has been top croc on this river
for decades,
369
00:37:45,760 --> 00:37:50,640
with over 60 pointed teeth.
370
00:38:00,320 --> 00:38:05,880
And while now in his late 50s
he might be considered an old croc,
371
00:38:05,960 --> 00:38:08,760
he has learnt a new trick.
372
00:38:12,960 --> 00:38:19,240
Casanova has adapted to the presence
of humans in an unexpected way.
373
00:38:19,320 --> 00:38:25,040
He associates the rumble of a boat
crammed with tourists
374
00:38:25,120 --> 00:38:27,320
with dinner.
375
00:38:29,840 --> 00:38:31,360
MAN: Life jackets.
376
00:38:31,440 --> 00:38:32,960
They're situated just up there.
377
00:38:33,360 --> 00:38:35,120
I'm not even going to show you
how to put one on.
378
00:38:35,200 --> 00:38:36,680
Does anyone know why?
379
00:38:39,680 --> 00:38:42,080
Crocodiles are attracted
to bright colours, OK?
380
00:38:42,160 --> 00:38:43,240
And splashing.
381
00:38:43,320 --> 00:38:46,200
So, um... And there's about
5,000 crocodiles in this river.
382
00:38:46,280 --> 00:38:49,000
If you end up in the water,
you won't have time to drown anyway.
383
00:38:49,080 --> 00:38:52,080
Yeah? So, number one,
avoid going in the water.
384
00:38:52,160 --> 00:38:54,840
But, um, if we do,
life jackets are useless.
385
00:38:58,600 --> 00:39:00,920
When not chasing the female crocs,
386
00:39:01,000 --> 00:39:05,200
Casanova puts his natural abilities
to good use
387
00:39:05,280 --> 00:39:07,760
and thrills the tourists.
388
00:39:14,080 --> 00:39:19,720
A wavelike thrust created by
hundreds of muscles working in tandem
389
00:39:19,800 --> 00:39:23,080
propels two thirds of his body
clear from the surface...
390
00:39:32,280 --> 00:39:35,040
..finishing the leap with a bite -
391
00:39:35,120 --> 00:39:38,360
the strongest down force
of any animal.
392
00:39:47,240 --> 00:39:49,160
Although it looks unnatural,
393
00:39:49,240 --> 00:39:53,040
crocs will leap for animals
on overhanging trees.
394
00:39:53,120 --> 00:39:55,680
He's ready to go now. Look at this.
395
00:39:55,760 --> 00:39:57,120
No mucking around.
396
00:39:58,160 --> 00:40:00,440
Here we go. Here we go. Oh!
397
00:40:00,520 --> 00:40:01,880
Alright.
398
00:40:06,240 --> 00:40:08,360
(TOURISTS GASP)
There we go.
399
00:40:08,720 --> 00:40:14,600
Only here in Australia have Casanova
and his saltie rivermates
400
00:40:14,680 --> 00:40:18,680
learned to jump for rewards
offered up by humans.
401
00:40:19,040 --> 00:40:21,040
To avoid a crocodile attack
is very easy.
402
00:40:21,120 --> 00:40:23,000
You stay back six metres
from the water's edge
403
00:40:23,080 --> 00:40:24,360
and you never enter the water.
404
00:40:24,440 --> 00:40:27,560
Those two simple things -
never get attacked by a crocodile.
405
00:40:28,840 --> 00:40:32,680
Although that is a very complex
thing to comprehend for some people.
406
00:40:41,200 --> 00:40:46,800
On this river, human and reptile
have found a way to coexist.
407
00:40:46,880 --> 00:40:51,880
Not that life is now easy
for the continent's apex predator.
408
00:40:56,320 --> 00:40:58,840
He is relentlessly hunted...
409
00:40:58,920 --> 00:41:02,280
..by the march fly.
410
00:41:09,600 --> 00:41:11,960
Not just here to hitchhike...
411
00:41:13,080 --> 00:41:18,240
..the fly seeks out divots
in the croc's armour plating.
412
00:41:24,240 --> 00:41:27,040
Weakness found.
413
00:41:27,120 --> 00:41:32,600
It bores its drill-like proboscis
into the soft area of skin below.
414
00:41:40,920 --> 00:41:45,600
A modified form of saliva prevents
the croc's blood from clotting.
415
00:41:49,760 --> 00:41:56,400
And then the fly mops up the blood
with its fleshy mouthparts,
416
00:41:56,480 --> 00:42:01,640
filling to bursting point
on its victim's rich, cold blood.
417
00:42:07,640 --> 00:42:09,920
The delicate three-layered eyelid
418
00:42:10,000 --> 00:42:12,680
is particularly susceptible
to attack.
419
00:42:19,240 --> 00:42:21,440
Nostrils are targeted too.
420
00:42:24,800 --> 00:42:28,360
And from this perspective,
the menacing croc
421
00:42:28,440 --> 00:42:32,800
is reduced to no more than
an involuntary blood donor.
422
00:42:36,720 --> 00:42:42,480
Although he does have
one pest control strategy - mud.
423
00:42:44,560 --> 00:42:48,400
Australia's all-natural
fly repellent.
424
00:42:55,000 --> 00:43:01,240
Not only a barrier to flies but also
a salve to soothe irritating bites.
425
00:43:06,240 --> 00:43:08,440
At least for a moment.
426
00:43:10,720 --> 00:43:13,920
It's not fatal,
but it feels like torture.
427
00:43:17,240 --> 00:43:20,520
And despite
its ancient evolutionary line,
428
00:43:20,600 --> 00:43:25,560
the croc still has
a distinct design fault -
429
00:43:25,640 --> 00:43:30,760
legs so short that there's an itch
that can't be scratched.
430
00:43:40,080 --> 00:43:42,320
While the croc
is at war with its flies,
431
00:43:42,400 --> 00:43:44,320
the rest of the creatures
432
00:43:44,400 --> 00:43:48,040
who call Australia's
northern monsoon region home
433
00:43:48,120 --> 00:43:52,200
battle the extreme variations
in climate.
434
00:43:54,840 --> 00:43:56,120
Birds migrate
435
00:43:56,200 --> 00:43:59,720
to cope with the dramatic pulses
of the wet and the dry.
436
00:44:03,120 --> 00:44:06,520
Other creatures
do not have this luxury.
437
00:44:06,600 --> 00:44:12,000
Unable to move with the seasons,
they must stay and face the elements.
438
00:44:17,240 --> 00:44:21,440
On these floodplains
in the far north of Arnhem Land,
439
00:44:21,520 --> 00:44:25,040
a creature has evolved
a unique coping mechanism
440
00:44:25,120 --> 00:44:27,720
to survive this seasonal change.
441
00:44:30,520 --> 00:44:32,360
The children of Maningrida,
442
00:44:32,440 --> 00:44:36,360
whose playground
spans these northern floodplains,
443
00:44:36,440 --> 00:44:41,480
have discovered an extraordinary
web of life beneath their feet.
444
00:44:48,000 --> 00:44:52,400
In this one small area,
they have helped scientists identify
445
00:44:52,480 --> 00:44:58,000
an astonishing new species
of tarantula, or Kidjikarrabba.
446
00:45:04,080 --> 00:45:08,120
Like most spiders, they have
eight eyes and eight legs
447
00:45:08,200 --> 00:45:13,600
but what sets these tarantulas apart
is their dashing red coat.
448
00:45:17,480 --> 00:45:21,840
And fangs long enough
to dig deep into flesh.
449
00:45:26,960 --> 00:45:31,520
The floodplain is pockmarked
by thousands of spider burrows -
450
00:45:31,600 --> 00:45:35,640
a megacluster of ambush hunters.
451
00:45:49,320 --> 00:45:53,200
The female will spend hours
waiting motionless
452
00:45:53,280 --> 00:45:56,320
for the perfect dinner guest.
453
00:46:00,640 --> 00:46:04,680
She has laid silk out
around her burrow entrance.
454
00:46:04,760 --> 00:46:07,680
It's a carpet of trip wires.
455
00:46:45,480 --> 00:46:51,440
Once in the tarantula's vicelike
grip, there's no hope of escape.
456
00:46:53,800 --> 00:46:59,880
She deals a final blow,
injecting it with toxic venom.
457
00:47:01,040 --> 00:47:04,040
The grasshopper is paralysed.
458
00:47:06,640 --> 00:47:08,960
Her last catch for the dry season.
459
00:47:09,040 --> 00:47:10,080
[THUNDER RUMBLES]
460
00:47:10,160 --> 00:47:15,720
Rumbles outside suggest
her world is about to be inundated.
461
00:47:18,240 --> 00:47:21,440
The monsoon has arrived.
462
00:47:23,600 --> 00:47:27,040
Thunderheads
reach over 12,000 metres high.
463
00:47:29,600 --> 00:47:33,120
Electric charges
begin to spark and fire.
464
00:47:35,720 --> 00:47:39,640
A thunderstorm producing the
equivalent energy of an atomic bomb.
465
00:47:40,000 --> 00:47:42,600
[THUNDER CRASHES]
466
00:47:55,640 --> 00:47:59,240
A flood makes its way
towards the plain.
467
00:48:06,120 --> 00:48:08,320
For a creature
that lives underground,
468
00:48:08,400 --> 00:48:11,120
this can only spell danger.
469
00:48:24,560 --> 00:48:27,760
But she is no ordinary tarantula.
470
00:48:30,840 --> 00:48:34,480
She won't flee her burrow
as the watertable rises.
471
00:48:38,240 --> 00:48:42,560
She has her own
silvery life support system.
472
00:48:42,640 --> 00:48:46,680
Her hairy coat traps air bubbles.
473
00:48:49,680 --> 00:48:51,520
Keeping movement to a minimum,
474
00:48:51,600 --> 00:48:55,800
she can survive
on these tiny air pockets.
475
00:49:03,080 --> 00:49:08,240
Like an astronaut in space,
she has created her own atmosphere.
476
00:49:10,920 --> 00:49:15,600
Known only as the diving tarantula,
their discovery is so recent,
477
00:49:15,680 --> 00:49:19,160
they are yet to be officially named
by science.
478
00:49:25,520 --> 00:49:27,600
By the peak of the wet season,
479
00:49:27,680 --> 00:49:32,200
this area will be
under half a metre of water
480
00:49:32,280 --> 00:49:33,880
and, with nowhere to go,
481
00:49:33,960 --> 00:49:38,680
it's assumed she'll remain submerged
for the next four months.
482
00:49:40,080 --> 00:49:45,000
Scientists estimate there are
25,000 diving tarantulas
483
00:49:45,080 --> 00:49:47,120
on this floodplain -
484
00:49:47,200 --> 00:49:51,080
the highest concentration
of tarantulas anywhere in the world.
485
00:49:52,560 --> 00:49:57,440
Most certainly this is no place
for an arachnophobe,
486
00:49:57,520 --> 00:50:00,480
or even a family holiday.
487
00:50:03,800 --> 00:50:06,720
As the wet season
departs the Top End,
488
00:50:06,800 --> 00:50:12,080
it leaves behind a vivid savanna,
plumped by the rain.
489
00:50:12,160 --> 00:50:16,960
Now it will be the dry season's turn
to repaint the landscape.
490
00:50:18,920 --> 00:50:24,280
But before the greens turn brown,
they will be dressed in black.
491
00:50:33,000 --> 00:50:36,600
200km south of Maningrida,
492
00:50:36,680 --> 00:50:40,000
the Indigenous rangers
of Central Arnhem Land
493
00:50:40,080 --> 00:50:43,320
are setting the ground alight.
494
00:50:51,360 --> 00:50:52,640
They burn now
495
00:50:52,720 --> 00:50:56,680
to prevent uncontrollable wildfires
later in the season.
496
00:51:04,640 --> 00:51:07,400
The crisp grass ignites quickly.
497
00:51:07,480 --> 00:51:10,960
The flames move on,
leaving the trees intact.
498
00:51:20,080 --> 00:51:24,880
And as the smoke builds,
the rangers know to look skyward.
499
00:51:29,240 --> 00:51:33,880
They will almost always see
a black kite overhead.
500
00:51:41,520 --> 00:51:43,280
As the grass burns,
501
00:51:43,360 --> 00:51:47,600
a mass exodus of creatures
is forced to flee the heat.
502
00:51:59,440 --> 00:52:03,600
So the black kite,
precision instrument that she is,
503
00:52:03,680 --> 00:52:08,040
can swoop on parbaked bugs.
504
00:52:23,440 --> 00:52:26,960
But the kite
doesn't feast alone for long.
505
00:52:29,680 --> 00:52:36,720
As the smoke builds, so do the kites,
arriving from kilometres around -
506
00:52:36,800 --> 00:52:38,600
hundreds of them.
507
00:52:57,880 --> 00:53:00,720
All are competing now for the spoils.
508
00:53:03,120 --> 00:53:06,440
Squabbles break out. Talons clash.
509
00:53:10,120 --> 00:53:14,240
The traditional owners know
what this bird might do next.
510
00:53:18,480 --> 00:53:22,560
For thousands of years,
Dreaming stories have been told
511
00:53:22,640 --> 00:53:25,840
of a bird that makes its own fires.
512
00:53:29,680 --> 00:53:33,120
The clever Firebird, or Karrkkanj.
513
00:53:36,400 --> 00:53:38,880
The only creature other than humans
514
00:53:38,960 --> 00:53:43,280
known to harness fire
for personal gain.
515
00:54:42,240 --> 00:54:48,200
The kite has been witnessed building
new fires to flush out more insects,
516
00:54:48,280 --> 00:54:51,240
creating new hunting opportunities.
517
00:55:09,200 --> 00:55:13,520
And despite being
the world's most common raptor,
518
00:55:13,600 --> 00:55:17,480
it is only Australia's kites
which do this.
519
00:55:24,200 --> 00:55:26,920
Rangers are left to deal with
extra fires
520
00:55:27,000 --> 00:55:31,680
while those guilty
of fueling the flames fly free
521
00:55:31,760 --> 00:55:35,240
and are very likely to reoffend.
522
00:55:40,400 --> 00:55:43,160
For tens of thousands of years,
523
00:55:43,240 --> 00:55:46,240
Indigenous people
have been telling the stories
524
00:55:46,320 --> 00:55:49,680
of this ancient land
and its creatures...
525
00:55:52,160 --> 00:55:56,400
..and yet there is so much
about Australia's wildlife
526
00:55:56,480 --> 00:55:59,280
that remains unknown
to the world beyond.
527
00:56:01,560 --> 00:56:03,320
About the intelligence...
528
00:56:06,240 --> 00:56:07,920
..the resilience...
529
00:56:13,200 --> 00:56:17,920
..and the perseverance of these
unique and irreplaceable creatures.
530
00:56:20,280 --> 00:56:22,000
Some are thriving...
531
00:56:28,760 --> 00:56:30,760
..while others are on the edge.
532
00:56:36,680 --> 00:56:39,600
Australia may be an ancient land
533
00:56:39,680 --> 00:56:42,880
whose creatures
have grown over millennia
534
00:56:43,360 --> 00:56:46,680
from her rock, soil and flora...
535
00:56:49,920 --> 00:56:53,200
..but human change
is shifting everything.
536
00:56:54,520 --> 00:56:58,400
What this means for the future
of Australia's animals
537
00:56:58,480 --> 00:57:00,960
is another story again.
43579
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