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Even the young comfort each other with hugs and sex. Victorian scientists saw animals having more offspring than seemed necessary: Many questions remain surrounding the mechanism behind female—female pairing; additional data on chick parentage and long-term fitness are needed to better understand the nature and adaptive value of this strategy. This article has been cited by other articles in PMC. Only two species have been observed showing a same-sex preference for life, even when partners of the opposite sex are available. A female may engage in female-female mounting, but that doesn't mean she isn't interested in males. Characteristics of dinucleotide microsatellite loci Click here to view.

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But ultimately, all concerned will go on to have offspring with the opposite sex.

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Introduction Unrelated same-sex individuals pairing together and cooperating to raise offspring over many years is a rare occurrence in the animal kingdom Bagemihl There is no way the behaviour can be evolutionarily irrelevant. Modelling impacts of long-line fishing: Since then, scientists have studied these behaviours systematically. Female—female pairing has not been documented previously in albatross, which is often regarded as an icon of monogamy. The female siblings of homosexual sheep could even produce more offspring than average. Lots of animals engage in homosexual behaviour, but whether they are truly homosexual is another matter entirely.

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That many humans are homosexual is well known but we also know the behaviour is extremely common across the animal kingdom, from insects to mammals. A female may engage in female-female mounting, but that doesn't mean she isn't interested in males. All research was conducted under necessary state, federal and institutional protected wildlife permits. Here we have reported the first record, to our knowledge, of female—female pairing and cooperative breeding in albatross and in the order Procellariiformes. It seems obvious that this built-in need to keep reproducing would manifest itself in a powerful sex drive, one that might well spill over into mating while females are infertile, or same-sex matings. In the wild, flies in different habitats may have slightly different pheromone blends.