"So many vaginas, such a short life," says one biologist in a raucous new book on the diversity of females in the animal kingdom. The hyena, for example, uses her 8-inch clitoral tube to pee, copulate ...

From ducks to dolphins, females have developed sex organs that help them deter undesirable suitors and derive pleasure from non-reproductive behavior Rachel E. Gross Biologists of the past often ...

I probably don't need to tell you that, although they're among our most basic biological functions as human beings, conception and pregnancy are basically the closest any of us are ever going to get ...

A team of biologists discovered anatomical details about the female reproductive tract in waterfowl that indicate that male and female anatomy have coevolved in a "sexual arms race." While the anatomy ...

A photo of a female duck leading 76 ducklings went viral. Renee Montagne speaks with Dave Rave, a wildlife manager for the Minnesota's Department of Natural Resources, to find out what's happening.

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. BROOKLYN, N.Y. — A male ruddy duck with a sky-blue beak coasted across a pond here at the ...

For ornithologist Richard Prum, manakins are among the most beautiful creatures in the world. He first started studying these small South American birds in 1982, and he’s been privy to many of their ...