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With its tropical beaches, sunshine,
sand, and sea,
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thousands of people flock to the Caribbean
each year in search of paradise.
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But the Caribbean has a hidden wild side.
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Its islands are forged by cataclysmic forces.
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And they bear the brunt
of the most violent storms on earth.
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Island life
makes specialists and opportunists,
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seafarers, and castaways.
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From the most fragile hummingbird
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to ocean giants
that have visited these shores
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since the time of the dinosaurs.
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Born of volcanoes, battered by hurricanes,
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this is the wild side of paradise.
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Between the continents
of North and South America
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lies a tropical paradise.
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The Caribbean,
an archipelago of over 7,000 islands
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and reefs lying
within the crystal clear waters
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of the Caribbean Sea.
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From just a few meters wide
to hundreds of km across,
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every island is different,
and each has its own unique wildlife.
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From the tropical forests
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to the reefs beneath the waves,
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the Caribbean hides
a secret treasure trove of life.
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Trinidad is the southern most island
in the Caribbean.
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In Trinidad's northeast corner,
the Caribbean Sea
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meets the rough waters
of the Atlantic Ocean.
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Legends of hidden treasure
have long drawn travelers
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to these islands from across the Atlantic.
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But some of nature's greatest seafarers
have been visiting
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the Caribbean shores far longer.
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00:03:10,556 --> 00:03:13,805
At night, Trinidad's beaches
play host to creatures
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that have been around
since dinosaurs walked the earth.
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It's April,
and the start of the nesting season
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for leatherback turtles.
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Each year, female leatherbacks
return to the Caribbean
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from thousands of km away,
across the open ocean.
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They return to lay their eggs
on the very same beaches
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where their own lives began.
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Leatherbacks
are the largest sea turtles on earth,
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growing up to two meters long
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and weighing up to 1,000 kilos.
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The female uses her massive flippers
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to dig a huge pit in the sand.
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She excavates a deep nest
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into which she lays nearly 100 eggs.
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The temperature of the nest
will determine the sex of the hatchlings.
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If it's higher than 30° C,
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the hatchlings will be females.
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Cooler nests produce males.
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The smaller eggs are yolkless and sterile.
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They're designed to collapse over time
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to make extra room
when the babies come to hatch.
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Finally, the nest is filled with sand,
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leaving a large disturbed area
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to make detection by predators difficult.
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Nesting can take up to three hours.
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The exertion involved is obvious.
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A few meters away,
she begins digging another giant sand angel.
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This is a decoy nest
to further confound predators.
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She's not alone.
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Trinidad's beaches have the densest population
of nesting leatherbacks in the world.
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At the peak of the season,
space is in short supply.
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Up to 500 turtles may visit a single beach
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in just one night.
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Leatherbacks coming ashore to nest
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collide with those intent
on returning to the sea.
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The scrum for space inevitably results
in turtles digging up each others' eggs.
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Sunrise can catch latecomers unawares.
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The short time the females spend nesting
on the Caribbean's beaches
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offers a rare glimpse into the lives
of these secretive sea turtles.
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Dawn brings opportunistic scavengers.
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They've learned that at this time of year,
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the beach brings rich pickings.
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For the eggs left exposed in the scramble
for nesting space, there's no hope.
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Trinidad's vultures thrive
on this seasonal windfall of turtle eggs.
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Youngsters learn about the whereabouts of food
from more experienced birds.
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Even though
there's plenty of eggs to go 'round,
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squabbles are common.
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But the vultures aren't all bad news.
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Left to rot, these eggs
would putrefy in the sand
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and pose a risk to the eggs
still incubating in their nests.
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By getting rid of the waste eggs,
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the vultures
are helping to keep the beach clean.
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00:08:59,358 --> 00:09:01,212
Heading north from Trinidad,
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a chain of small islands
known as the Winward and Leeward isles,
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marks the eastern edge of the Caribbean Sea.
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These islands are on the border
between two tectonic plates,
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and this was once
a region of intense seismic activity.
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There are currently 17 active volcanoes
in the Caribbean,
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including one submerged beneath the sea.
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The island of Dominica
was forged from volcanoes
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just 26 million years ago,
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making it the youngest island
in the Caribbean.
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Less than 50 km long,
with its volcanic peaks
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towering 1,500 meters above the sea,
its a vertical island.
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00:10:01,681 --> 00:10:06,509
Despite its small size,
Dominica has nine active volcanoes,
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the highest concentration
found anywhere in the world.
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00:10:12,420 --> 00:10:15,687
There's not been a major eruption
for centuries,
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00:10:15,847 --> 00:10:19,800
but there's plenty of volcanic activity
bubbling below the surface.
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00:10:24,826 --> 00:10:28,841
Dominica's Boiling Lake
is a huge flooded fumarole.
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00:10:36,390 --> 00:10:40,000
The water can reach temperatures
of more than 90° C
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as sulfur dioxide and hydrochloric acid
are released
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from the lava
trapped in the volcano below.
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The Caribbean's explosive past
has left these islands
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with a unique legacy of life.
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00:11:02,814 --> 00:11:05,586
Volcanic soils are extremely fertile,
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fed by plentiful rainfall
over the mountains.
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00:11:13,275 --> 00:11:15,781
Just about anything will take root,
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00:11:15,941 --> 00:11:20,160
and all these flowers provide food
for some of the Caribbean's fastest movers,
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hummingbirds.
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00:11:28,779 --> 00:11:32,490
Hungry for nectar,
hummingbirds have no sense of smell.
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00:11:33,902 --> 00:11:37,009
They're attracted by the colorful appearance
of the flowers.
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00:11:40,450 --> 00:11:43,203
These tiny dynamos
have the fastest metabolism
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of any animals on earth.
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00:11:48,628 --> 00:11:51,862
Their hearts average 500 beats a minute,
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00:11:52,022 --> 00:11:55,354
and their wings can beat
up to 80 times in a second.
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To fuel this super fast flying,
they must eat
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up to three times their body weight
every single day.
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00:12:08,907 --> 00:12:11,701
Standing less than 10 centimeters tall,
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the Antillean crested hummingbird
is one of the Caribbean's smallest.
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00:12:17,894 --> 00:12:20,946
Only males bear
the distinctive mohawk of feathers
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that gives these birds their name.
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00:12:28,912 --> 00:12:31,337
Females have a more discreet appearance,
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which helps keep them safe
whilst raising their young.
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The chicks need extra protein
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and are fed a regurgitated mixture
of nectar and insects.
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On this rich diet, they grow rapidly.
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00:13:02,516 --> 00:13:06,340
The nest is crafted
almost entirely from spider silk,
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00:13:06,500 --> 00:13:10,737
making it elastic so it stretches
as the chicks grow bigger.
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00:13:12,796 --> 00:13:15,514
Just two weeks after hatching,
these chicks
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are almost ready to leave the nest.
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00:13:25,989 --> 00:13:29,600
The Caribbean's hummingbirds have developed
a very special relationship
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with one particular type of plant.
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Heliconia plants are found
across the Caribbean islands.
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Each island has its own different species,
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and all rely on hummingbirds
to spread their pollen.
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00:13:51,205 --> 00:13:52,774
While feeding on nectar,
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hummingbirds transfer pollen
from flower to flower,
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allowing the plants to reproduce.
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00:14:02,189 --> 00:14:03,789
But on a small island,
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there's no room for competition,
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and the relationship between heliconias
and hummingbirds goes one step further.
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In most cases,
the size and shape of the flower
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matches exactly
the beak of the hummingbird
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that spreads its pollen.
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00:14:28,782 --> 00:14:33,360
Each bird has exclusive feeding rights
to a particular species of heliconia
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so there's less competition for food.
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Both beaks and flowers have co-evolved
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to be a perfect fit.
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The fertile soils
of the Caribbean's volcanic islands
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are good for people, too.
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00:15:09,399 --> 00:15:11,151
The original Caribbean islanders
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came from the South American mainland.
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Traveling by canoe, they began settling
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on the more mountainous volcanic islands
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around 4,000 years ago.
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00:15:35,017 --> 00:15:38,960
The new settlers were used
to life in the vast forests of South America,
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where there'd been
an abundance of big animals to hunt.
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The small islands of the Eastern Caribbean
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have no large indigenous mammals.
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The sea proved too big a barrier for them.
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With little to hunt on land,
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the first islanders
turned their attention back to the sea.
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Over the years, they became experts
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at fishing and foraging.
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Just like the Caribbean's wildlife,
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its first people
had to adapt to life on an island.
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The Caribbean's volcanic past
plays another crucial role.
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00:16:34,822 --> 00:16:38,566
The mountains are so tall,
they create their own weather.
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00:16:40,790 --> 00:16:43,592
As moist air from the sea
rises above the peaks,
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it forms clouds,
and with the clouds comes the rain.
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00:16:52,498 --> 00:16:57,600
Some areas of Dominica
receive over 700 cm of rain each year.
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Rain brings a plentiful supply
of fresh water,
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vital for an island to sustain both human
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and animal life.
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00:17:26,591 --> 00:17:30,560
Fresh water flows down the island's
many waterfalls for the coast,
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feeding nutrients into the Caribbean Sea.
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Even here,
there are signs of volcanic activity,
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with submerged fumaroles venting gases
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through cracks in the sea floor.
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These warm, nutrient-rich waters
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create the ideal conditions
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for one of the Caribbean's richest treasures,
its coral reefs.
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Over 800 different species of fish
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and many more crustaceans and invertebrates
live in the coral reefs.
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00:18:15,136 --> 00:18:17,337
Many of the fish
that find shelter or protection
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in the Caribbean's reefs
are found nowhere else on earth.
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00:18:26,934 --> 00:18:29,115
But the reefs can be dangerous, too.
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Over the centuries, thousands of ships
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have foundered
in the Caribbean's treacherous currents
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00:18:42,878 --> 00:18:44,653
and ferocious storms.
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00:18:49,635 --> 00:18:53,994
In 1867, the Rhone, a Royal Mail steamer,
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00:18:54,154 --> 00:18:57,454
was driven aground on the reef
at Black Point Rock,
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just off the British Virgin Islands.
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00:19:04,767 --> 00:19:07,343
The Rhone sank to the bottom in seconds,
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00:19:07,503 --> 00:19:10,149
claiming the lives of over 100 people.
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00:19:14,276 --> 00:19:18,920
More than a century later,
the ship has a new lease of life.
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00:19:24,742 --> 00:19:27,955
Corals have colonized its rusting hull,
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00:19:28,115 --> 00:19:30,643
making it hard to tell where the reef ends
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00:19:30,803 --> 00:19:33,045
and the Rhone begins.
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00:19:46,722 --> 00:19:52,520
Some fish even entrust the safety of their
future offspring to the remains of the ship.
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00:19:52,698 --> 00:19:55,511
These purple patches are actually the eggs
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00:19:55,671 --> 00:19:58,153
of the sergeant major fish.
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00:19:58,313 --> 00:20:01,618
After the female has laid
as many as 200,000 eggs,
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she departs, leaving the male
as the sole protector.
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00:20:07,512 --> 00:20:10,958
He will guard the nest
until the eggs hatch,
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00:20:11,118 --> 00:20:13,948
just six days after being fertilized.
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00:20:15,972 --> 00:20:19,240
It's not just year-round residents
like the sergeant major fish
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that rely on the Caribbean Sea
as a place to raise their young.
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00:20:25,208 --> 00:20:28,652
In the far north of the Caribbean
is a shallow area of sea
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00:20:28,812 --> 00:20:31,316
sitting on a huge limestone shelf
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known as the Silver Bank.
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00:20:36,560 --> 00:20:40,132
A Spanish galleon sank here
in the 17th century,
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00:20:40,292 --> 00:20:43,625
and a horde of silver treasure
was lost to the sea,
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00:20:43,785 --> 00:20:46,553
which is how the Silver Bank got its name.
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00:20:50,871 --> 00:20:55,120
Nowadays, these waters shelter treasures
of a wilder kind.
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00:20:57,655 --> 00:21:01,397
The Silver Bank is a vast carving pool
for humpback whales.
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00:21:13,829 --> 00:21:16,122
The bond between
the humpback mother and calf
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00:21:16,282 --> 00:21:17,963
is extremely strong.
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00:21:24,357 --> 00:21:31,000
Parent and child are inseparable
as the mother teaches her calf to swim and dive.
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00:21:38,376 --> 00:21:40,802
Each year between December and April,
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00:21:40,962 --> 00:21:44,988
around 3,000 humpbacks
pass through the Silver Bank.
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00:21:49,578 --> 00:21:53,063
As summer approaches,
the whales return to their feeding grounds,
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thousands of kilometers away
in the cold North Atlantic.
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00:22:00,387 --> 00:22:02,763
The Caribbean's role as a nursery
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00:22:02,923 --> 00:22:06,482
is vital for the survival
of these great ocean voyagers.
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00:22:14,795 --> 00:22:16,613
Virtually all the Caribbean islands
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have coral reefs on their shores.
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00:22:20,378 --> 00:22:26,240
But there's one island whose coastal waters
have almost no reefs at all, Trinidad.
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00:22:30,894 --> 00:22:33,112
Trinidad lies so close to South America
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00:22:33,272 --> 00:22:36,057
that silt from the Orinoco River
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00:22:36,217 --> 00:22:39,773
makes the sea surrounding it
too muddy for coral to grow.
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00:22:42,735 --> 00:22:46,840
But coral reefs have played a part
in the making of the island itself.
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00:22:48,698 --> 00:22:51,856
Mount Tamana in Trinidad's high land heart
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00:22:52,016 --> 00:22:54,463
was once an ancient coral reef.
235
00:22:57,445 --> 00:22:59,671
Thousands of years ago,
the reef was pushed up
236
00:22:59,831 --> 00:23:02,327
to over 300 meters above sea level
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00:23:02,487 --> 00:23:04,885
by powerful volcanic forces.
238
00:23:07,899 --> 00:23:10,361
Today, the ancient reef
forms a massive network
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00:23:10,521 --> 00:23:12,371
of limestone caves.
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00:23:24,895 --> 00:23:26,699
Beyond the reach of daylight,
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00:23:26,859 --> 00:23:30,212
the caves are teeming
with over 1 million bats.
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00:23:39,740 --> 00:23:44,280
Eleven different species
lurk in the dark of the Tamana caves,
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00:23:44,434 --> 00:23:46,929
and many have intriguing names.
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00:23:49,085 --> 00:23:52,126
The spear-nosed bat
and the funnel-eared bat
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00:23:52,286 --> 00:23:55,398
roost alongside naked-backed, leaf-nosed,
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00:23:55,558 --> 00:23:58,037
mouse-eared, and tailless bats.
247
00:24:00,174 --> 00:24:04,400
The floor of the bat cave is piled high
with all kinds of bat droppings,
248
00:24:04,555 --> 00:24:07,201
and this guano supports
a surprisingly diverse
249
00:24:07,361 --> 00:24:09,687
community all of its own.
250
00:24:19,397 --> 00:24:23,089
It's an unglamorous location,
but for cave cockroaches,
251
00:24:23,249 --> 00:24:25,135
the copious amounts of guano
252
00:24:25,295 --> 00:24:27,877
provide an endless supply of food.
253
00:24:35,791 --> 00:24:40,840
Most of these cockroaches will spend
their whole lives buried in bat droppings.
254
00:24:45,386 --> 00:24:50,680
The roaches are a source of food for other
animals in the cave, like the whip scorpion.
255
00:24:53,120 --> 00:24:55,127
Despite its name and appearance,
256
00:24:55,287 --> 00:24:57,695
it's actually a type of spider.
257
00:25:01,281 --> 00:25:04,460
In the weak sunlight
that reaches the cave's entrance,
258
00:25:04,620 --> 00:25:07,869
seeds excreted by the bats
commonly sprout
259
00:25:08,029 --> 00:25:10,302
in the nutrient-rich guano.
260
00:25:12,354 --> 00:25:15,358
The lack of light
makes the seedlings fragile,
261
00:25:15,518 --> 00:25:19,206
the stems growing long
in a bid for the sun.
262
00:25:21,713 --> 00:25:24,548
Above ground,
the forest surrounding the caves
263
00:25:24,708 --> 00:25:28,495
is rich in flowers, fruit, and insects.
264
00:25:38,968 --> 00:25:41,737
Each evening, as daylight fades,
265
00:25:41,897 --> 00:25:44,330
the bats emerge to feed.
266
00:25:51,291 --> 00:25:53,810
Some travel from deep within
the labyrinth of tunnels
267
00:25:53,970 --> 00:25:57,957
and passageways
up to 300 meters underground.
268
00:26:08,322 --> 00:26:12,005
With so many bats
leaving through one small entrance,
269
00:26:12,165 --> 00:26:15,039
the mass exodus takes more than an hour.
270
00:26:29,201 --> 00:26:31,720
Trinidad's tropical forests are also home
271
00:26:31,880 --> 00:26:34,447
to some rather less gothic residents.
272
00:26:37,044 --> 00:26:38,957
A male golden-headed manakin
273
00:26:39,117 --> 00:26:41,018
trying to attract a mate.
274
00:26:47,433 --> 00:26:49,681
In the branches of a tree, the male birds
275
00:26:49,841 --> 00:26:53,487
share a communal display site
known as the lek.
276
00:26:59,746 --> 00:27:02,491
Each male competes for female attention
277
00:27:02,651 --> 00:27:05,630
by dancing on their own personal perch.
278
00:27:09,821 --> 00:27:12,488
The slightest movement
can trigger a display.
279
00:27:13,751 --> 00:27:15,458
Even a passing agouti.
280
00:27:26,828 --> 00:27:30,640
Elsewhere in the forest,
a group of male white-bearded manakins
281
00:27:30,800 --> 00:27:33,580
are also intent on courtship.
282
00:27:35,526 --> 00:27:37,766
With their more down-to-earth appearance,
283
00:27:37,926 --> 00:27:41,299
these manakins base their lek
on the forest floor.
284
00:27:42,831 --> 00:27:45,215
Keen to impress, each bird works hard
285
00:27:45,375 --> 00:27:49,678
to keep its own private court
clear of debris and fallen leaves.
286
00:28:04,982 --> 00:28:08,246
White-bearded manakins
have their own unique display.
287
00:28:14,077 --> 00:28:16,801
They raise their chin feathers
to make a beard,
288
00:28:16,961 --> 00:28:18,994
which is how they got their name.
289
00:28:20,022 --> 00:28:21,797
The loud snapping noises are made
290
00:28:21,957 --> 00:28:25,207
as they strike their wings together
behind their backs.
291
00:28:29,336 --> 00:28:32,800
Eventually, the commotion
has the desired effect,
292
00:28:32,960 --> 00:28:34,937
the arrival of a female.
293
00:28:41,999 --> 00:28:44,077
Despite her rather dull appearance,
294
00:28:44,237 --> 00:28:47,085
she provokes a frenzy of activity
from the males
295
00:28:47,245 --> 00:28:49,874
as each competes for her attention.
296
00:28:56,484 --> 00:28:59,100
The female will only mate when she's ready,
297
00:28:59,260 --> 00:29:02,891
and this time,
the males have failed to impress.
298
00:29:14,012 --> 00:29:17,921
As summer approaches,
the sun-drenched islands of the Caribbean
299
00:29:18,081 --> 00:29:20,873
become an altogether darker place.
300
00:29:28,911 --> 00:29:30,688
From June to November,
301
00:29:30,848 --> 00:29:35,601
these islands are in the firing line
of the most ferocious storms on earth.
302
00:29:46,378 --> 00:29:49,587
Most hurricanes begin life
as tropical storms
303
00:29:49,747 --> 00:29:51,869
off the coast of West Africa.
304
00:29:55,309 --> 00:29:58,281
They roar across the Atlantic,
sucking up heat
305
00:29:58,441 --> 00:30:00,102
from the warmth of the water,
306
00:30:00,262 --> 00:30:02,379
and growing in intensity.
307
00:30:07,110 --> 00:30:11,680
The islands of the Caribbean are the first
land masses these hurricanes encounter.
308
00:30:14,009 --> 00:30:18,044
If the winds that drive them
reach 120 km/h,
309
00:30:18,204 --> 00:30:20,717
the storms rank
as fully fledged hurricanes.
310
00:30:34,915 --> 00:30:37,213
Even with the best forecasting,
311
00:30:37,373 --> 00:30:40,978
no one can predict
when a hurricane will strike.
312
00:30:47,885 --> 00:30:51,327
The hurricanes bring waves
up to 20 meters high.
313
00:31:03,975 --> 00:31:07,019
Lobsters are especially vulnerable
in a storm.
314
00:31:09,136 --> 00:31:11,243
Being crushed by stones or loose corals
315
00:31:11,403 --> 00:31:13,380
is a real possibility.
316
00:31:16,548 --> 00:31:20,034
As the hurricane draws in,
the water temperature drops
317
00:31:20,194 --> 00:31:22,588
and its salinity increases.
318
00:31:23,620 --> 00:31:28,840
Sensing these changes,
lobsters from across the reef take flight.
319
00:31:42,732 --> 00:31:47,800
They march in single file, conserving energy
by following in each others' slipstreams.
320
00:31:56,587 --> 00:31:59,819
Each year, the lobsters
undertake this migration
321
00:31:59,979 --> 00:32:03,449
to pass the stormy season
in the safety of deeper waters.
322
00:32:11,748 --> 00:32:13,574
A particularly violent hurricane
323
00:32:13,734 --> 00:32:15,946
can destroy the reef itself.
324
00:32:22,328 --> 00:32:24,553
Fragile corals are uprooted
325
00:32:24,713 --> 00:32:27,697
and smashed
at the powerful churning water.
326
00:32:33,681 --> 00:32:37,767
Within hours,
thousands of years of growth are undone,
327
00:32:37,927 --> 00:32:41,360
and an entire ecosystem lies devastated.
328
00:32:54,903 --> 00:32:58,844
But reefs can recover,
and corals grow fast.
329
00:33:00,222 --> 00:33:03,729
The destruction wrought by hurricanes
is not irreversible.
330
00:33:28,778 --> 00:33:33,320
Many Caribbean islands have their own living,
growing defense against hurricanes,
331
00:33:34,702 --> 00:33:36,430
mangrove forests.
332
00:33:39,256 --> 00:33:42,347
With one foot on the shore
and one in the sea,
333
00:33:42,507 --> 00:33:45,305
the mangrove forms a natural breakwater.
334
00:33:48,042 --> 00:33:50,859
The tangle of roots
reduces the power of big waves
335
00:33:51,019 --> 00:33:54,887
and storm surges,
protecting the shore behind.
336
00:33:57,212 --> 00:34:00,505
Caroni Swamp lies on Trinidad's west coast.
337
00:34:09,397 --> 00:34:12,236
As the tides rise,
the mangrove is inundated
338
00:34:12,396 --> 00:34:14,810
with seawater twice a day.
339
00:34:24,005 --> 00:34:27,310
Few plants can cope
with such salty conditions.
340
00:34:28,335 --> 00:34:32,760
Many Caribbean mangroves have only
three or four different species of tree.
341
00:34:37,458 --> 00:34:39,379
Yet the trees create a habitat
342
00:34:39,539 --> 00:34:42,804
that shelters a rich and unique ecosystem.
343
00:34:56,647 --> 00:34:58,810
The constant rise and fall of the tides
344
00:34:58,970 --> 00:35:01,213
presents both opportunities and challenges
345
00:35:01,373 --> 00:35:03,840
to the animals that live in the mangrove.
346
00:35:06,394 --> 00:35:10,323
When the tide is out,
four-eyed fish sometimes beach themselves
347
00:35:10,483 --> 00:35:13,688
on the exposed mud flats to catch insects.
348
00:35:20,430 --> 00:35:25,520
As the tide rises, the fish feed
on tiny crustaceans on the surface.
349
00:35:28,068 --> 00:35:30,993
This surface dwelling lifestyle
leaves them vulnerable
350
00:35:31,153 --> 00:35:34,282
to attack from above and below.
351
00:35:36,676 --> 00:35:40,030
Spectacled caiman patrol Caroni's waters.
352
00:35:43,113 --> 00:35:46,144
And fish-eating birds are here in abundance.
353
00:35:59,605 --> 00:36:02,864
The four-eyed fish
are well equipped to keep watch.
354
00:36:04,096 --> 00:36:07,757
Despite their name,
they actually have just two eyes,
355
00:36:07,917 --> 00:36:10,498
each of which is split in half.
356
00:36:10,658 --> 00:36:15,216
Each eye has two pupils,
one for focusing above the surface,
357
00:36:15,376 --> 00:36:18,103
the other for focusing underwater.
358
00:36:19,382 --> 00:36:21,163
These unique eyes are essential
359
00:36:21,323 --> 00:36:23,535
for avoiding Caroni's predators.
360
00:36:35,948 --> 00:36:39,215
Sometimes even four eyes aren't enough.
361
00:36:52,563 --> 00:36:55,933
At low tide,
the swamp's thick, glutenous mud
362
00:36:56,093 --> 00:36:59,948
is a rich source of food
for Caroni's crab population.
363
00:37:02,972 --> 00:37:07,600
Each teaspoon of mud contains
around 10 million bacteria,
364
00:37:07,763 --> 00:37:11,695
and this bacteria
supports a wealth of tiny animal life.
365
00:37:12,884 --> 00:37:16,054
Fiddler crabs use their one small claw
for the vital task
366
00:37:16,214 --> 00:37:19,457
of collecting this microscopic food
from the mud.
367
00:37:21,363 --> 00:37:24,848
With just one hand,
it's a time consuming process.
368
00:37:29,810 --> 00:37:32,575
Their big claw is reserved for waving
369
00:37:32,735 --> 00:37:35,551
in a display designed to attract a mate.
370
00:37:38,529 --> 00:37:42,400
Fiddlers also wave to defend their burrows
from rival crabs.
371
00:37:49,448 --> 00:37:52,059
Having an escape hole is vital.
372
00:37:52,219 --> 00:37:54,058
There are predators around.
373
00:37:58,577 --> 00:38:02,061
When the tide is out,
scarlet ibis probe the mud
374
00:38:02,221 --> 00:38:05,683
in search of fiddler crabs
and other crustaceans.
375
00:38:14,127 --> 00:38:17,725
It's this diet of red shellfish,
rich in carotene,
376
00:38:17,885 --> 00:38:20,540
that gives the ibis their vivid color.
377
00:38:27,870 --> 00:38:29,890
Young birds are born gray,
378
00:38:30,050 --> 00:38:34,160
and it takes about two years
before they've eaten enough crabs to turn red.
379
00:38:41,193 --> 00:38:43,690
Dipping the crabs in the water
before swallowing them
380
00:38:43,850 --> 00:38:45,990
helps rinse off some of the mud.
381
00:38:58,038 --> 00:39:00,812
The ibis forage together
with other water birds,
382
00:39:00,972 --> 00:39:04,037
like egrets, herons, and plovers.
383
00:39:14,782 --> 00:39:18,072
Having a larger group helps stir up the silt,
384
00:39:18,232 --> 00:39:20,467
making it easier to catch prey.
385
00:39:25,051 --> 00:39:27,386
And with caiman lurking nearby,
386
00:39:27,546 --> 00:39:29,386
there is safety in numbers.
387
00:39:34,332 --> 00:39:38,118
Every evening at dusk,
the ibis return in great flocks
388
00:39:38,278 --> 00:39:40,519
to tiny islands within the mangrove.
389
00:39:43,539 --> 00:39:46,157
They gather in their hundreds
to roost for the night.
390
00:39:48,827 --> 00:39:52,136
Originally these birds were immigrants
from the mainland,
391
00:39:52,296 --> 00:39:54,381
with South America lying just 11 km
392
00:39:54,541 --> 00:39:56,674
from Trinidad's western shores.
393
00:39:59,312 --> 00:40:03,049
At its peak,
Trinidad's population of scarlet ibis
394
00:40:03,209 --> 00:40:05,613
can number more than 15,000.
395
00:40:06,659 --> 00:40:09,580
It's now recognized
as the island's national bird.
396
00:40:17,878 --> 00:40:21,280
The ibis are not the only
South American import on the island.
397
00:40:23,930 --> 00:40:27,920
Trinidad was only separated from the mainland
around 12,000 years ago,
398
00:40:28,089 --> 00:40:31,508
when sea levels rose
at the end of the last Ice Age.
399
00:40:35,167 --> 00:40:38,635
As a result,
it's home to South American mammals
400
00:40:38,795 --> 00:40:41,279
that are found
nowhere else in the Caribbean.
401
00:40:44,913 --> 00:40:48,765
The silky anteater
is the world's smallest anteater,
402
00:40:48,925 --> 00:40:51,578
only slightly larger than the human hand.
403
00:40:53,839 --> 00:40:58,800
Though tiny, these anteaters can eat
up to 5,000 ants every night.
404
00:41:02,678 --> 00:41:05,799
During the day, the ants have little to fear.
405
00:41:11,258 --> 00:41:13,288
Silky anteaters are nocturnal,
406
00:41:13,448 --> 00:41:17,136
and in the heat of the sun,
sleeping takes precedence.
407
00:41:20,014 --> 00:41:23,240
There are larger South American imports
on Trinidad, too.
408
00:41:25,802 --> 00:41:29,360
The island is home to a troupe
of white-throated capuchin monkeys.
409
00:41:31,906 --> 00:41:34,690
Capuchins are found
across most of South America
410
00:41:34,850 --> 00:41:37,782
and are known
for being particularly resourceful.
411
00:41:40,433 --> 00:41:42,492
But life on a Caribbean island requires
412
00:41:42,652 --> 00:41:44,698
its own special strategies.
413
00:41:48,515 --> 00:41:52,193
Trinidad's capuchins have found
that the island's coconut palm trees
414
00:41:52,353 --> 00:41:54,296
are a rich source of food.
415
00:42:05,587 --> 00:42:10,000
Dead leaves and branches harbor
all kinds of insects and grubs.
416
00:42:15,475 --> 00:42:17,720
Having a prehensile tail to hang on with
417
00:42:17,880 --> 00:42:21,880
means that both hands are kept free
for eating and foraging.
418
00:42:27,483 --> 00:42:29,226
Trinidad's capuchins have learned
419
00:42:29,386 --> 00:42:32,262
to make the most
of the rise and fall of the tides.
420
00:42:46,869 --> 00:42:50,730
At low tide,
freshwater conches are left exposed,
421
00:42:51,674 --> 00:42:54,826
sitting targets for an opportunistic monkey.
422
00:42:57,224 --> 00:43:00,265
The conch is encased in a rock-solid shell,
423
00:43:00,425 --> 00:43:04,000
but the capuchins have found a way
to access the meat inside.
424
00:43:20,600 --> 00:43:23,038
Lying so close to South America,
425
00:43:23,198 --> 00:43:27,265
Trinidad has its own unique legacy
of mainland life.
426
00:43:27,425 --> 00:43:32,560
For those islands further away,
the Caribbean Sea has proved a bigger barrier.
427
00:43:35,003 --> 00:43:38,360
But some animals have succeeded
in becoming island hoppers.
428
00:43:40,096 --> 00:43:43,759
For land bound animals,
the Caribbean's hurricane season
429
00:43:43,919 --> 00:43:46,246
can offer opportunities for travel.
430
00:43:49,277 --> 00:43:51,688
Strong winds frequently uproot trees.
431
00:43:51,848 --> 00:43:56,040
So after a storm, there's lots of vegetation
drifting in the sea.
432
00:43:59,752 --> 00:44:04,132
These makeshift rafts are one way
in which reptiles like the iguana
433
00:44:04,292 --> 00:44:07,320
have been able to spread
from island to island.
434
00:44:12,937 --> 00:44:16,051
The Lesser Antillean iguana
has successfully colonized
435
00:44:16,211 --> 00:44:18,395
many of the Eastern Caribbean islands.
436
00:44:22,980 --> 00:44:26,416
On Dominica, a population of around 10,000
437
00:44:26,576 --> 00:44:29,471
lives in the low-lying forests on the coast.
438
00:44:37,618 --> 00:44:42,132
Iguanas follow a strict hierarchy,
which is color-coded.
439
00:44:44,567 --> 00:44:47,203
Dominant males turn dark gray
440
00:44:47,363 --> 00:44:50,066
with pale blue scales
on the side of their heads.
441
00:44:52,959 --> 00:44:56,726
Females, along with juveniles,
are bright green all over.
442
00:45:01,909 --> 00:45:04,923
Iguanas can live for up to 25 years,
443
00:45:05,083 --> 00:45:08,856
but with age,
the ability to change color is lost.
444
00:45:13,459 --> 00:45:15,278
April brings the mating season,
445
00:45:15,438 --> 00:45:18,521
and the females dig burrows
in which to lay their eggs.
446
00:45:25,007 --> 00:45:27,920
Each dominant male
defends a small territory
447
00:45:28,080 --> 00:45:30,291
with up to seven nesting females.
448
00:45:32,960 --> 00:45:35,733
Rivals are deterred from interfering
with the high reign
449
00:45:35,893 --> 00:45:38,155
with a display of aggressive head bobbing.
450
00:45:52,268 --> 00:45:54,982
Choosing a sunny nesting site is essential.
451
00:46:03,566 --> 00:46:06,234
After digging a burrow
and laying up to 18 eggs,
452
00:46:06,394 --> 00:46:09,880
the female plays no further role
in the care of her offspring.
453
00:46:11,885 --> 00:46:15,217
For the next three months,
the incubation of the eggs
454
00:46:15,377 --> 00:46:17,810
will rely entirely on solar power.
455
00:46:23,363 --> 00:46:27,634
Even buried a meter underground,
iguana eggs are vulnerable.
456
00:46:37,054 --> 00:46:40,918
Dominican ground lizards,
or abolo as they're known locally,
457
00:46:41,078 --> 00:46:43,466
are found only on this island.
458
00:46:57,233 --> 00:46:58,925
When the iguanas are nesting,
459
00:46:59,085 --> 00:47:02,658
ground lizards stay close,
patrolling untended nests
460
00:47:02,818 --> 00:47:04,411
in search of eggs.
461
00:47:22,140 --> 00:47:24,769
Lots of eggs fall foul of scavengers,
462
00:47:24,929 --> 00:47:26,993
but many more survive.
463
00:47:29,343 --> 00:47:32,235
By June, those that have survived
464
00:47:32,395 --> 00:47:34,021
are ready to hatch.
465
00:47:35,306 --> 00:47:38,126
Iguanas are a Caribbean success story.
466
00:47:40,559 --> 00:47:44,155
They've turned the devastation
brought by hurricanes to their advantage,
467
00:47:44,315 --> 00:47:49,200
using it to colonize islands that
would otherwise be completely out of reach.
468
00:47:52,629 --> 00:47:56,156
Some species have turned island hopping
into an art form.
469
00:48:04,237 --> 00:48:07,528
Coconuts are relative newcomers
to the Caribbean.
470
00:48:09,311 --> 00:48:14,480
Originally from Southeast Asia,
they only arrived around 500 years ago.
471
00:48:17,763 --> 00:48:19,827
These palms are perfectly designed
472
00:48:19,987 --> 00:48:22,858
to deal with the Caribbean's
frequent hurricanes.
473
00:48:25,406 --> 00:48:29,220
Up to 4,000 roots
spread laterally under the sand,
474
00:48:29,380 --> 00:48:34,720
giving the palm a firm anchor
to withstand winds of over 150 km/h.
475
00:48:36,511 --> 00:48:39,740
And strong winds
facilitate their travels, too.
476
00:48:41,918 --> 00:48:44,252
Hurricanes help dislodge their seeds,
477
00:48:44,412 --> 00:48:47,194
which are cast adrift
on the ocean currents.
478
00:48:49,044 --> 00:48:50,813
Coconuts are especially buoyant
479
00:48:50,973 --> 00:48:54,041
and can float for months on end
without sinking.
480
00:48:55,622 --> 00:48:57,762
When they eventually wash ashore,
481
00:48:57,922 --> 00:49:00,194
a new island is colonized.
482
00:49:01,910 --> 00:49:04,745
In just 500 years, coconuts have spread
483
00:49:04,905 --> 00:49:07,556
to virtually every island in the Caribbean.
484
00:49:14,296 --> 00:49:16,993
By early July, the leatherback turtle eggs
485
00:49:17,153 --> 00:49:18,836
are ready to hatch.
486
00:49:23,763 --> 00:49:28,760
It's time for the young turtles to leave
the safety of their nests on the Caribbean's beaches.
487
00:49:33,041 --> 00:49:36,048
The hatchlings emerge in perfect synchrony.
488
00:49:41,400 --> 00:49:44,959
Safety in numbers is their best chance
at reaching the sea.
489
00:49:52,751 --> 00:49:56,003
Over the next decade,
the youngsters will increase in size
490
00:49:56,163 --> 00:49:58,270
maybe 10,000 times.
491
00:50:05,352 --> 00:50:09,441
Even at this young age, the leatherback
can propel itself through the water
492
00:50:09,601 --> 00:50:13,040
with an efficiency
no other turtle can match.
493
00:50:14,321 --> 00:50:16,899
Once they take to the sea,
the leatherbacks will remain
494
00:50:17,059 --> 00:50:20,214
in the mysterious depths
of the open ocean
495
00:50:20,374 --> 00:50:22,174
for most of their lives.
496
00:50:23,540 --> 00:50:25,644
Only the female turtles will ever return
497
00:50:25,804 --> 00:50:27,719
to the Caribbean's beaches.
498
00:50:29,715 --> 00:50:33,393
Once they're fully grown,
they will come ashore to lay their eggs,
499
00:50:33,553 --> 00:50:38,560
just as their ancestors have done
for the last 100 million years.
500
00:50:50,642 --> 00:50:55,240
The islands of the Caribbean have been forged
by nature's most cataclysmic forces.
501
00:50:58,873 --> 00:51:01,472
Lying in the heart of Hurricane Alley,
502
00:51:01,632 --> 00:51:04,840
they must withstand
the most ferocious storms on earth.
503
00:51:08,418 --> 00:51:12,760
Yet these islands are home to a secret
and spectacular variety of wildlife.
504
00:51:14,613 --> 00:51:16,435
From wily opportunists
505
00:51:17,431 --> 00:51:19,000
to specialists,
506
00:51:21,147 --> 00:51:24,596
the Caribbean protects those
that live life in the fast lane
507
00:51:26,036 --> 00:51:28,993
and attracts seafarers from near and far.
508
00:51:35,927 --> 00:51:38,237
Though the pirates are long gone,
509
00:51:38,397 --> 00:51:41,230
the wild treasures of the Caribbean remain.
43453
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