Finding a mate is hard in the animal kingdom! As these strangest animal mating rituals show, it sometimes gets even more ...

From bold foxes to gregarious birds, animals’ personalities are increasingly being seen as crucial to conservation efforts.

For a small number of animals, reproduction marks a biological endpoint rather than a stage in an ongoing life cycle. Death ...

Over 130 mammal species can delay embryonic development, giving their offspring the best possible chance of survival in ideal ...

A team of shark researchers from the University of Hawaiʻi at Mānoa has solved a long-standing mystery, identifying the first ...

These three bird courtship displays are so bold, precise and theatrical that they make human romance look a little ...

About 3 to 5% of mammals are known to be monogamous, meaning they select one mate for life. Still, many monogamous species ...

There are some strange mating rituals in the wild. Birds court through dance and song, and some males fight for females’ ...

The official AKC breed standard states that Chihuahuas should not exceed 6 pounds, standing between 5 to 8 inches. However, ...

Correction: A previous version of this article described the kākāpō as almost blind. It has nocturnal vision. Originally ...

Animals have evolved to sleep in extreme ways — for example, taking micro naps during parenting, sleeping on the wing during ...