Earth at Night in Colour

The night.

A shadowy world that hides more than half the animals on our planet.

Until now, cameras only offered a glimpse into their lives.

But with next-generation technology,

we can see the night as clear as day.

With cameras a hundred times more sensitive than the human eye...

we can now capture the beauty of night...

in color.

Alien landscapes.

Strange creatures brought to life by the darkness.

Unseen behaviors.

Now we can follow the lives of animals

in Earth's last true wilderness.

The night.

The dusty plains of Zimbabwe.

At the height of the dry season.

As day draws to a close...

a family is on the move.

Mothers, sisters, aunts and cousins

on a migration to find water.

They're led by the oldest, most experienced member of the herd,

the grandmother.

Her family has four calves to look after.

One, an infant born just a few months ago.

She leads them all...

following paths etched in her memory.

But the promise of finding water across this parched land...

all too often ends...

in disappointment.

This summer, the elephants of Southern Africa

have been through their worst drought in 40 years.

Many of the water holes that are the lifeblood for animals here

now offer little more than a mud bath.

Elephants can only survive for three days without drinking.

They must find water soon.

- -

As the sun sets, the heat of day begins to fade.

The herd can travel vast distances in the cool of night.

We've never been able to see what happens on these epic nocturnal journeys.

But with cameras that can film by moonlight...

we can now show what the world's largest land mammal gets up to at night.

Elephants don't just use their vision at night.

They also have the most sophisticated night navigation equipment:

a two-meter trunk that they use like a periscope.

With twice the scent receptors of a bloodhound,

they raise their trunks to scan the darkness,

picking up tiny odors on the night breeze.

They can pinpoint the location of water...

from over a kilometer away.

At night, the herd also changes the way it moves.

They walk in tighter formation,

protecting their calves in the middle of the herd.

If anything ever scares the little ones...

There's always an adult nearby to comfort them.

And the family are right to guard their youngest.

At night...

it's hard to see what's lurking in the shadows.

But our cameras show the dangers they face.

Lions.

There are prides here that specialize in taking down elephants at night.

They wait on known routes to water.

On the lookout... for a target.

Sensing trouble, the family moves quickly on.

Elephants can travel at over 20 kilometers an hour.

But the youngsters can't sustain these speeds for long.

All the lions need to do is keep up the pressure...

and wait for their chance.

In the rush to get away, a calf has become separated from the herd.

It's small enough to be taken down by just one powerful lioness.

An alarm call alerts the herd.

A family of three-ton elephants

can see off even the biggest pride of lions.

Herds with the most experienced leaders

stand the best chance of saving their young ones.

But the family will face even greater threats in the nights ahead.

Hidden in grassland, at the elephants' feet,

is one of Africa's most secretive nocturnal foragers.

It may look like a tiny dinosaur,

but this is the world's only fully scaly mammal.

The pangolin.

They spend their days in burrows and only venture out after dark.

They track down insects at night with an exceptional sense of smell...

rooting them out with their long, curved claws.

Tonight a trail of ants has led this male out of his comfort zone.

There are some species of pangolin that have adapted to climb trees.

But this...

isn't one of them.

The ground pangolin may be no tree climber...

but he can walk over six kilometers on a single nightly forage.

What he's really on the lookout for... is this.

A giant termite mound.

For a hungry pangolin, this is a towering treasure trove of treats.

Using a sticky tongue...

That's almost as long as his body...

a pangolin can eat up to 30,000 insects a night...

in what has to be one of Africa's most bizarre midnight feasts.

A week has passed.

The elephants are still searching for water.

They've survived so far by draining the last drops

from dried-up water holes en route.

The oldest member of the herd must lead them to water soon.

With a mental map formed over decades,

she's brought the family to an ancient seep,

where water oozes up from underground wells.

It's a hidden lifeline in times of drought.

The elephants can smell the water through the earth,

and they know that to get to it, they must dig.

For the adults, it's easy.

But for calves...

it's more of a challenge.

They won't have tusks to dig with until they're two years old.

Tonight their chance of a much-needed drink

is about to be cut short.

The herd seems spooked.

In the darkness...

It's hard to see what's out there.

But night cameras reveal...

a gang of hyenas.

They've been attracted here by a large antelope known as a kudu

that's become stuck in the mud.