Male bonobos can decipher females' unreliable fertility signals, allowing them to focus their efforts on matings with the ...

Eight African penguins hatched at the Maryland Zoo. The offspring of these chicks could one day help boost the population of ...

A Galápagos bird species is stunning behaviorists with their “freewheeling” lifestyles. Described in the journal PLOS One, ...

Humans are far closer to meerkats and beavers for levels of exclusive mating than we are to most of our primate cousins, ...

A study reveals how seabream change sex and why some males invest more sperm, rewriting the hidden biology of these fish.

Milwaukee County Zoo opened its new rhino and hippo habitat Dec. 5, completing its Adventure Africa project, a $50 million ...