Typically, male birds have more vivid colours than females. As Charles Darwin first explained, the most colourful males are ...

Hidden layers of colour in the plumage of tanagers and some other songbirds explain what makes them so eye-catching ...

Mirasaura grauvogeli had a featherlike crest and a tail like a monkey. “It's been a long time since I've been so blown away by a new fossil discovery.” ...