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Scientists perceive homosexual behavior in animals to different degrees. Sexual selection Sexual reproduction evolution reproductive system Courtship display sexual ornamentation handicap principle sexy son hypothesis Fisherian runaway Mating systems mate choice mating call mating plug lek mating Copulation cloacal kiss sexual intercourse pseudocopulation Fertilisation internal external sperm competition traumatic insemination penile spines Modes monogamy promiscuity polyandry polygyny polygynandry semelparity and iteroparity opportunistic hermaphroditism cuckoldry seasonal synchrony Sexual dimorphism anisogamy oogamy Bateman's principle bimaturism cannibalism coercion Sexual conflict interlocus intralocus Interspecies breeding Non-reproductive behavior Fisher's principle. A majority of the research available concerning homosexual behavior in animals lacks specification between animals that exclusively exhibit same-sex tendencies and those that participate in heterosexual and homosexual mating activities interchangeably. There is evidence of same-sex sexual behavior in at least species of insects and arachnids. In fact, apparent homosexual individuals are known from all of the traditional domestic species, from sheep, cattle and horses to cats, dogs and budgerigars. Science Daily. Society for Science and the Public.

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Females will form " consortships " characterized by affectionate social and sexual activities. Adults only. Selected filters. Sexual activity between wild males typically involves mounting and anal intercourse.

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