"These dramatic stand-offs aren't necessarily two males fighting; it can be a female fending off a persistent male suitor." ...

The clip shows a non-lethal contest between two males during breeding season.

Like the males of many animal species, male Drosophila melanogaster fruit flies, a commonly studied lab animal, are aggressive toward one another and even fight when competing for resources such as ...

A pioneering study has unveiled the first paired observations of sexual behavior and vocalizations in wild leopard seals. The study on the mysterious leopard seal represents a major advance in ...

The piece of Russian amber allowed scientists to recreate the ancient scene from the past and understand current animal behavior. The fossil, found in Kaliningrad, Russia, is a "unicorn" because it ...

Dim the lights, put on some slow jams... get up in the tree? National Geographic's Crittercam technology just revealed a mating ritual never before seen in any bear species. An Andean bear named Ruru ...