mating

For Some Female Birds, Home Is More Important Than Husband

Female purple-crowned fairy-wrens are in such fierce competition over territory that they are willing to ‘divorce’ their male partners for a better patch, a study shows.

Does Size Matter? Not To Mosquitofish, It Doesn’t

Contrary to previous studies—and popular belief—genital size does not affect a male mosquitofish's ability to attract a mate.