Scientists even caught brown bears engaging in oral sex. While it is unclear why the animals would engage in such behaviour, Gunst-Leca said there were several possibilities, including adolescent females practising for sex with other monkeys, that it offers females a safer way of engaging in sexual behaviour than hooking up with aggressive male monkeys, or that adolescent females are often rejected by adult male monkeys, leaving them at a loss for partners of their own species. By Rachel Feltman posted Dec 18th, at 3: Interspecies sexuality is more common in species that are similar to one another because it makes more sense; these animals are more likely to get confused, or to see the qualities they naturally seek in a mate showcased rather inconveniently in the member of another species. Why would they do that? So future observations could tell us if this group specific oddity is just a short-lived fad—which can happen—or the beginning of something else. Or even something—dogs are known to hump legs, sofas and furniture. While the first report of a male Japanese macaque, or snow monkey, and female sika deer taking to each other was revealed earlier this year , scientists say they are now confident the behaviour is sexual after scrutinising adolescent females suggestively interacting with stags at Minoo in Japan. And sometimes they happen between totally different species. Male chihuahuas are perfectly capable of impregnating large dogs like German Sheperds , given the opportunity i. The latter is a well known practice, and the only available comparison, as during the study adolescent females were not seen performing sexual mounts on adult male monkeys. With no monkey-deer sexual interactions previously having been noticed at Minoo, the team say that the behaviour could be the start of a new custom, adding that adolescent females would watch others on the backs of the deer and try to take their place. The other two failed because another female macaques interrupted to have her own shot with the deer. Sexual interactions between snow monkeys and sika deer could be a new behavioural tradition within a group of monkeys observed in Japan, researchers have suggested. The few cases of heterospecific mating in distant species occurred between animals that were bred and maintained in captivity. To investigate, the team recorded the behaviour of snow monkeys at Minoo, north of Osaka in Japan. However, most of these occurrences were observed in phylogenetically close species and were mainly discussed in terms of their effect on fitness, hybridization and species survival. Of the eight failed interactions they watched, the five that involved females or immature males ended with macaques being bucked off onto the ground. Things can get a lot darker. Unexpectedly, pelvic thrusting was more common when the partner was a deer. But at least they were both birds. A study on the sexual interactions of a chicken, and a pigeon, for example, notes how strange it is that animals from different orders would behave in such a way. But such dalliances generally get less common the less closely related a pair of animals are. After seeing one instance of the behavior in , her group saw five individuals participating while recording data for the new study. The successful sexual interactions observed involved a male deer, with the majority involving an adult male: Want more news like this?
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