PFA

The whale calf wants to join in with the adults' nap-time, but it's not as easy as it looks. Staying vertical takes practice. The next challenge after that is buoyancy. Holding just the right amount of breath is an art.

With a wingspan of up to five metres, these mantas exploit the currents around Indonesia's Lesser Sunda Islands. They feed by filtering plankton from the water.

With the tide still dropping, the epaulette soon finds itself a fish out of water. But the miraculous epaulette has evolved an extraordinary strategy to cope - its breathing and heart rate slows down, and it uses its fins as feet to 'walk' to deeper water.

Most zebras are born when the grass is high and green. This is good for the mothers that have been carrying their baby for more than a year. The grass is very nutritious, so they recover faster from the long pregnancy.

Like most Australian mammals, they're marsupials. They appear dog-like, but they're more closely related to kangaroos than canines. Being marsupials, they rear their young in a pouch.

The Dhofar range is home to one of Arabia's best-adapted desert animals: Camels.

The raccoon is noted for its intelligence, and studies show that it can remember the solution to tasks for at least three years.

Sahara Desert 🌍 Natural World S36E04

This is a conservation and recreational lake. It covers half a hectare (1.25 acres) and is 5.5m deep at some points. There’s a cod-hole that is home to Mary River Cod, as well as Spangled Perch and three Australian Lungfish.