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Homosexual behavior in animals. Two male mallards (Anas platyrhynchos) 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. This may include same-sex sexual activity, courtship, affection, pair bonding, and parenting among same ...
The biology of sexual orientation has been studied in detail in several animal model systems. In the common fruit fly Drosophila melanogaster , the complete pathway of sexual differentiation of the brain and the behaviors it controls is well established in both males and females, providing a concise model of biologically controlled courtship ...
Behavioral ecology is the study of the ecological and evolutionary basis for animal behavior; Biodiversity; Bioethics; Biology and sexual orientation; Ethology is the scientific study of animal behavior, and a branch of zoology; cognitive ethology fuses cognitive science and classical ethology to observe animals under more-or-less natural ...
Giraffes in Kenya; giraffes have been called "especially gay " for engaging in male-male sexual behavior more often than male-female (heterosexual) sex. [1][2] This is a list of mammals for which there is documented evidence of homosexual behavior. These animals have been observed practicing homosexual courtship, sexual behavior, affection ...
Female and male sexual behaviour differ in many species. Often, males are more active in initiating mating, and bear the more conspicuous sexual ornamentation like antlers and colourful plumage. This is a result of anisogamy, where sperm are smaller and much less costly (energetically) to produce than eggs.
The domestic sheep (Ovis aries) is the only species of mammal except for humans which exhibits exclusive homosexual behavior. [1][2][3] "About 10% of rams (males) refuse to mate with ewes (females) but do readily mate with other rams." [2] Thirty percent of all rams demonstrate at least some homosexual behavior. [4]
v. t. e. The relationship between the environment and sexual orientation is a subject of research. In the study of sexual orientation, some researchers distinguish environmental influences from hormonal influences, [1] while other researchers include biological influences such as prenatal hormones as part of environmental influences.
Human sexuality. Human sexuality is the way people experience and express themselves sexually. [1][2] This involves biological, psychological, physical, erotic, emotional, social, or spiritual feelings and behaviors. [3][4] Because it is a broad term, which has varied with historical contexts over time, it lacks a precise definition. [4]