While mammals are known for feeding milk to their young, some bird species produce a similar substance called crop milk.

The animal kingdom mirrors our own in many ways, like how animals care for their young. Just as humans hire babysitters or ...

In fact, social monogamy is extremely common in birds and somewhat common in mammals, while sexual monogamy is vanishingly ...

Superb starlings help care for the offspring of birds they are not related to. “To me, that sounds like friendship,” one ...

In this species, all individuals – males, females, young and adults – learn ... Our study supports the idea that both male and female birds can advertise their personality when singing ...

Female birds are more vulnerable than males ... where extra-pair young have been shown to be more likely to be male, the mitonuclear incompatibility hypothesis was retrospectively tested.

Global study reveals colorful urban birds thrive, challenging long-held assumptions in urban ecology, with implications for ...

Male birds have interior testicles, while female birds have one ovary each ... How do Birds Raise their Offspring? For 90% of bird species, raising offspring is a shared task between males ...