Homosexual behavior in animals
Why this is trending
Interest in “Homosexual behavior in animals” spiked on Wikipedia on 2026-07-21.
Categorised under Science & Nature, this article fits a familiar pattern. Interest in science articles on Wikipedia often follows major discoveries, published studies, or tech industry news.
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Key Takeaways
- Various non-human animal species exhibit behavior that can be interpreted as homosexual or bisexual, often referred to as same-sex sexual behavior (SSSB) by scientists.
- Various forms of this are found among a variety of vertebrate and arthropod taxonomic classes.
- Scientists observe same-sex sexual behavior in animals in different degrees and forms among different species and clades.
- Although same-sex interactions involving genital contact have been reported in many animal species, they are routinely manifested in only a few, including humans.
- The motivations for and implications of these behaviors are often lensed through anthropocentric thinking; Bruce Bagemihl states that any hypothesis is "necessarily an account of human interpretations of these phenomena".
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Source summary
WikipediaVarious non-human animal species exhibit behavior that can be interpreted as homosexual or bisexual, often referred to as same-sex sexual behavior (SSSB) by scientists. This may include same-sex sexual activity, courtship, affection, pair bonding, and parenting among same-sex animal pairs. Various forms of this are found among a variety of vertebrate and arthropod taxonomic classes. The sexual behavior of non-human animals takes many different forms, even within the same species, though homosexual behavior is best known from social species.
Scientists observe same-sex sexual behavior in animals in different degrees and forms among different species and clades. A 2019 paper states that it has been observed in over 1,500 species. Although same-sex interactions involving genital contact have been reported in many animal species, they are routinely manifested in only a few, including humans. Other than humans, the only known species to exhibit exclusive homosexual orientation is the domesticated sheep (Ovis aries), involving about 10% of males. The motivations for and implications of these behaviors are often lensed through anthropocentric thinking; Bruce Bagemihl states that any hypothesis is "necessarily an account of human interpretations of these phenomena".
Proposed causes for same-sex sexual behavior vary across species. Theories include mistaken identity (especially for arthropods), sexually antagonistic selection, balancing selection, practice of behaviors needed for reproduction, expression of social dominance or submission, and social bonding. Genetic, hormonal, and neurological variations as a basis for individual behavioral differences within species have been proposed, and same-sex sexual behavior has been induced in laboratory animals by these means.
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