Animal sexual behaviour
（重定向自Animal sexual behavior）
![Stags fighting – a common sexual behaviour](/Images/godic/202412/21/KaempfendeHirsche-2-cropped5127.jpg")
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![Anatomical structures on the head and throat of a domestic turkey. 1. Caruncles, 2. Snood, 3. Wattle (dewlap), 4. Major caruncle, 5. Beard. During sexual behaviour, these structures enlarge or become brightly coloured.](/Images/godic/202412/21/Anatomy_of_turkey_head5127.jpg")
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Animal sexual behaviour takes many different forms, including within the same species. Common mating or reproductively motivated systems include monogamy, polyandry, polygamy, and promiscuity. Other sexual behaviour may be reproductively motivated (e.g. sex apparently due to duress or coercion and situational sexual behaviour) or non-reproductively motivated (e.g. interspecific sexuality, sexual arousal from objects or places, sex with dead animals, homosexual sexual behaviour, bisexual sexual behaviour, and a range of other behaviours).