Fossilized feathers of an extinct bird show it molted differently than modern birds. The prehistoric bird lost its feathers all at once, while many modern birds molt in waves. Regrowing feathers uses ...

Fork-tailed flycatchers make a fluttering sound with their wings—but separate subspecies have different “dialects” of fluttering. Christopher Intagliata reports. Charles Darwin is most famous for his ...

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Female tanager birds dig flamboyant males. So to build plumage that really pops with orange or red or yellow, a male has to eat fruits and absorb their carotenoids. The fancy feathers he produces then ...