From an evolutionary and biological perspective, animals are driven to have sex in order to procreate. But there is a lot more to sexual relations between animals. Animal sex is at least as strange and varied as human sex. A male might copulate with many females. And female animals of many species can be choosy, too. Homosexuality is common. Monogamy is rare. And the animal kingdom is full of swingers. In short, with animals, sex can be wild.
Mary's species of fish never evolved to have sex or incubate live young. She did it anyway.
Female dragonflies say no to sex by faking their deaths, new research has found.
For Valentine’s Day, Live Science gathers together some of the more extravagant and outlandish courtship rituals in the animal kingdom.