In good light, black on wings and tail ... While monotypic, birds in the south average smaller and tend to show bare dark grayish skin below eye (similar in shape to the yellow skin on yellow ...

Now, for the first time, researchers have translated birds’ sleeping muscle activity ... have vibrant yellow feathers covering their bellies, brownish-orange wings and a black-and-white ...

One of Australia's largest species of cockatoo, the yellow-tailed black cockatoo, is hard to miss. It's loud, with a distinctive screech and a gently undulating movement in flight. Bird lovers on ...