Episode 3
Mammals
New filming techniques reveal behaviour that was previously impossible to capture in extreme locations. Fly amongst one of the largest migrations on Earth, as more than ten million fruit bats leave the Congo basin and converge in a few special trees in Zambia to feed; sprint with the tiny, extraordinary-looking sengi as it escapes a predatory lizard; see 30 polar bears gather to feed on a bowhead whale carcass; and witness the biggest fight on Earth... male humpback whales battling for a female.
Key animal characters:
• Straw-coloured fruit bats
• Sengi
• Polar bears
• Humpback whales

Baby African elephant walking behind mother (Loxodonta africana)
Masai Mara, Kenya

African straw-coloured fruit bats in flight, Kasanka National Park,
Zambia

Polar bears scavenge on bowhead whale carcass, Alaska, USA