Mating calls and rituals can be intercepted, or drowned out, by invasive species. Scientists are just starting to understand ...

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

When it comes to animals romancing in the wild, things get weird—really weird. Some animals offer bizarre gifts, some put on daring dances, and others? Well, let’s just say things get really messy.

Evolutionary biologist Nathan H. Lents details how animal relationships can offer perspective on sexual diversity, social monogamy and gender identity—for humans.