Birds-of-paradise are known for their bright colours and courtship displays. Now, it turns out that many species also have body parts that fluoresce ...

The feathers around a crow’s head are smooth and neat. Ravens and crows have different tail shapes. In flight, the birds have different tail feather silhouettes. Crow tail feathers are all the ...

Largest crow in North America, with uniformly black plumage and fan-shaped tail. Bill is larger than ... Juvenile: brownish cast to feathers; grayish eye, and fleshy gape (quickly darkening ...