The male species is remarkably more colourful than the female in most species, as has been an endless source of wonder for ...

This separation of sexes in plants is called dioecy. One reason why dioecy may evolve is because of the negative effects that ...

The deer had both internal male and female anatomy. "A DEC biologist checked it out and confirmed that it was in fact a true ...

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

In the Himalayan forests, the satyr tragopan performs one of the bird world’s most dramatic courtship displays.

Men and women are both obsessed with women's breasts, but the genders view them differently. Cup size is just one of several ...

Boulenger’s backpack frog uses one of the strangest reproductive strategies in the amphibian world. Females carry fertilized ...

It may sound freaky, but the Japanese yellow swallowtail butterfly can actually 'see' with its genitals. Twenty years ago, ...

Learn all about the unmistakable pilot whale, from their diet and size to life in the pod and why, sadly, they're prone to ...