For two million years African cuckoo finches have been tricking other birds into raising their young by mimicking the colour of their eggs, but new research suggests the tables may be turning in this ...

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 ...

Birders are going cuckoo for a rare sight on Long Island. The common cuckoo bird has been spotted only four times in U.S. history in the lower 48 states, experts say. Now, it's in Riverhead. Hundreds ...

Nest building is costly. It requires time, energy, and constant defence from predators. For birds that raise their own young, this investment makes sense because it ensures survival of their chicks.

To someone watching birds casually, the cuckoo’s behaviour looks almost lazy. Instead of gathering twigs, lining a nest, and feeding its chicks, the cuckoo quietly slips its egg into another bird’s ...