Does a cuckoo know it's a cuckoo? The answer is more difficult than you might think, explains Richard Pallardy ...

European cuckoos lay very different eggs depending on the host species. Genetic analyses have revealed how this adaptation is inherited without leading to speciation. Subscribe to our newsletter for ...

Breakthroughs, discoveries, and DIY tips sent six days a week. Terms of Service and Privacy Policy. The label “parasite” might bring to mind images of hookworms ...

Brood parasites are some of the bird kingdom’s most notorious sneaks. They don’t rear their own young but instead pawn the task of child care off onto other species without their knowledge. Instead of ...

A cuckoo bird named PJ just broke an impressive record: He traveled more than 50,000 miles (80,000 kilometers) in the past five years while migrating to and from the U.K. To better understand why ...

Common cuckoo (Cuculus canorus) in flight. This is an adult male: Grey morph adult females have a pinkish-buff or buff background to the barring and the sides of the neck, and sometimes small rufous ...

A bird sighting on New York’s Long Island has avian enthusiasts flocking to the region in hopes of spotting a feathered friend that has never been seen before in the state. The common cuckoo is ...