Sexual selection operates through competition for mates and mate choice, shaping phenotypes from elaborate courtship displays to microscopic gamete strategies. It interacts with natural selection to ...

Most animals would be afraid to go near a crocodile, but biting flies have no qualms about landing on this fearsome predator and drinking its blood. This photo, taken by Zeke Rowe in Panama’s Coiba ...

Interspecific competition, the contest between different species for resources or space, is a fundamental force shaping where species can live and how communities assemble. Across environmental ...