- [Narrator] Take flight with the planet's
greatest endurance athletes.
Every year, shore birds embark on a mysterious migration
to the top of the world and back.
- [Speaker] Where is it stopping?
What threats is it facing along the way?
If we're lucky enough to get a tag fixed on,
it will immediately begin giving us data.
- [Narrator] Data is critical because around the world
shore bird populations are collapsing.
- The fact that globally, shore bird populations
are crashing is not surprising, but also shocking
just by how perfect a storm
they're having to weather right now.
- [Narrator] Straddling two countries
is the most famous waterfall in the world.
Where every second, over 3000 tons of water
flows over the edge.
Discover the geological wonder of Niagara Falls.
Beautiful, charismatic and incredibly varied.
There are over 240
different woodpecker species in the world.
Think you know the woodpecker?
Think again.
This is The Hole Story.
In East Africa, there is a spectacle of nature
that can be seen from space.
- That migration of wildebeest
is a spectacular thing to see.
- [Narrator] It's an event that supports
an entire ecosystem.
But the world is changing.
- I've seen the number of this wildebeest decreasing.
- The migration is gone because of the fences.
- [Narrator] A delicate balance has been upset.
- It breaks at my heart.
Who is responsible for them?
Who is the voice for these animals?
- [Narrator] Deep in Texas, there is a very elusive
and endangered cat population.
- The ocelots range within Texas has been shrinking
'cause of a number of human-related factors.
The efforts for ocelot conservation
I feel have been in vain.
- [Narrator] There are fewer than 80 known ocelots
in the wild.
- [Ben] Time is not a friend of ours.
- [Narrator] Every kitten is precious.
- [Ben] I hope you can see that we got the ocelot kittens.
Oh, my god.
- [Narrator] Canidaes, come in many forms.
But as a family,
they are the most successful carnivore on the planet.
Discover the secret to their success
in the ultimate look at wild dogs.
In these waters lies a complex world,
where life and death coexist in a marriage of necessity.
Take a deep breath and discover the soul of the ocean.