Sudden extremes can act as hard boundaries, limiting where species can breed, feed, or recover.

The pava aliblanca was declared extinct before being rediscovered in Peru, becoming a symbol of wildlife conservation.

A dawn chorus sounds like hundreds of songbirds, each one singing something different. Nearly all of them are working from ...

This winter, tens of thousands of birders will survey winter bird populations for the National Audubon Society’s Christmas Bird Count, part of an international bird census, powered by volunteers, that ...

These secretive birds usually stay alone on the forest floor.

Don't let their innocent looks fool you — these small backyard birds can be an aggressive menace to desirable native species ...

A superb fairy-wren calls to a Horsfield's bronze-cuckoo. Brood parasites like cuckoos lay eggs in other birds' nests and leave them behind for the host birds to raise. David Ongley / Cornell Lab of ...

CLIMATEWIRE | Millions of birds are winging their way north now as part of their annual spring migration, preparing to settle down in their summer homes and raise their young. But some species may be ...