New research reveals how flamingos can stand – and even sleep – on one leg for so long.
These birds spend long periods, often asleep, standing on one leg. Is it passive biomechanics or active nervous system control of their muscles that allows them to do easily what's impossible for us?
Millions of birds breed in lakes so alkaline they can burn human skin.
How and why these bizarre stars of Planet Earth II ended up living in icy lakes high in the Andes mountains.