Birds are known for flying in the sky but not all birds can fly. Some birds spend their lives on the ground or in water and they are still strong and smart. These birds use their leg speed or swimming ...

Flightlessness has evolved repeatedly and independently across avian lineages, yielding a remarkable array of giant and diminutive species from ratites to extinct ...

In recent years, people have been paying more attention to how animals survive in their environments. Flightless birds are a group that always surprises us. Even though they can’t fly, they have found ...

WELLINGTON, New Zealand — The world’s only flightless parrot species was once thought to be doomed by design. The kakapo is too heavy, too slow and, frankly, too delicious to survive around predators, ...