Planet Earth II: Season 1, Episode 4

1 - 4: Jungles

The world's deserts are lands of extremes, forcing animals to come up with ingenious ways to cope with the hostile conditions and giving rise to the most incredible survival stories on Earth.

A pride of desert lions is so hungry they risk hunting a giraffe several times their size, while male sand grouse fly 120 miles each day to the nearest waterhole and dice with death to collect water for their chicks.

Filmed for the first time, a tiny bat does battle with one of the world's deadliest scorpions. And in Madagascar a locust swarm of biblical proportions is revealed as never before.