Male cricket's behaviour like a female

Male and Female Deer

Male and Female Dogs

Male and Female Cats

Male and Female Horses

Male and Female Cows

A Male and a Female Adhering to a Parallele-piped

Male and Female Chin Dogs

Water Dropper Shaped Like a Female Deer

Male three-spined stickleback chasing a female out of the territory

Female-female fighting behavior of the Japanese horned beetle

Indiscriminate consumption of unrelated eggs by a gravid female and a satellite male in natural nests

Encountering when a male visited the territory of a female

Spawning behaviour of a butterflyfish

Male-male fighting behavior of the seed bug, Togo hemipterus

Approach with stalking by the male to the female in Microvelia horvathi Lundblad, 1933

A male baikal teal displaying head-pumping in front of a female

Courtship behaviour of a male peacock

Mating behaviour of a jumping bristetail (?)

Courtship display of male guppy

Sneaking of male guppy

Waving behaviour of a fiddler crab, Uca lactea lactea

Courtship behavior of female three-spined stickleback Gasterosteus aculeatus

Homo-sexual behaviour in a dolphin 3

Homo-sexual behaviour in a dolphin 1