Planet Earth II

Remote islands offer sanctuary for some of the planet's creatures, including the rare, pygmy three-toed sloth. For marine iguanas, however, island life comes at a cost as they must escape deadly racer snakes the moment they hatch.

While cities may seem an unlikely place for animals to thrive, they can be a world of surprising opportunity. Peregrine falcons hunt among New York's skyscrapers and in Ethiopia, locals live in harmony with wild hyenas.

While mountain ranges are some of the planet's most spectacular landscapes, few animals have what it takes to live in the harsh habitats. From snow leopards to grizzly bears, the secret lives of mountain creatures are revealed.

Jungles provide the richest habitats on the planet where animals attempt to survive in the most competitive place on earth. Forests are home to jaguars and flying dragons, and the night conceals creatures never filmed before.

Deserts are lands of extremes that force animals to cope with hostile conditions. A pride of lions are so hungry, they risk hunting a giraffe several times their size. Then, a bat battles one of the world's deadliest scorpions.

Animals endure the most hostile seasonal changes on the planet to survive in the grasslands. From Asia's saiga antelope to the anteaters of Brazil, grassland animals have adapted in extraordinary ways to cope with these extremes.