The first exhibition in the world on the status of homosexuality in animals have shown that homosexuality in humans is not unnatural.
Animal gay
Homosexual behavior has been observed scientific quite thoroughly in almost all animals. Worldwide, a total of 450 species have a habit of homosexual relations.
McFarlane find homosexual behavior in primates is more common than in other mammals, but not without at birds, reptiles, amphibians, fish, insects and animals invertebrates. Not only wildlife, but also livestock survive this phenomenon, especially rams.
Most homosexual behavior described in the books have appeared in mammals. Giraffes live in the whole group of males, and they just relations with the deer breeding purposes. About 80% of relationships between male giraffes together sexual nature, and often present with behavioral ride together. Rate ride together in the male lion is 8%.
In particular, the primates have sexual relationships with men are complex. About 30 species of primates have been recorded as having "had dated for" gay, even couples relate to each other very long.
Bird gay
Over 130 species of birds, including flamingos famous species of rare, spend some time in her life to sexual relationships with men.
McFarlane said: "Flamingos are a good example for homosexuality in birds. About 6% of empty real flamingos dancing together and do all the" games "that males and females are do, including cuddling and nurturing of children. We can take a nest and raise their chicks. "
The surprising thing is in waterbirds, gay males are often more successful than the birds' wife family ", simply because they are more aggressive and can invade a lot more territory. Among Roseate Terns pair, one third are "pure sister" - they started dancing together and raising children. Both lay eggs, and usually some fertilized egg remains, indicating that they had regularly "enter unnecessarily," both with "men".
In Australia, scientists have counted over 40 species of birds have homosexual behavior. This trend may continue to grow. Even in species galah, homosexuality continues to be maintained even when the "mate" died, the population of the herd or vacancy-free to change.
Finding answers
According to Darwin's theory of evolution, evolutionary animal for traits change will create reproductive advantages for them. These characteristics would be passed down to generations to come. Previously, biologists had repeatedly tried to explain about homosexual behavior in animals, such as animals, "wrong" sex, naughty, or "collective" before "battle" really . One may argue that homosexuality occurs because the community lacks the males or females, or as a result of the captive.
One of the latest theories is the theory of "entertainers" by Paul Vasey of the University of Lethbridge (Canada). He made observations about homosexual behavior of baboons Japan and found that 33% of their homosexual behavior between the children. And his explanation is something that no one had thought: We do it just for fun!
So homosexual behavior is innate or learned that? As well as other acts of animals, this is the interface between nature and the role of "learning", and each species carries a different characteristic. In terms of "learning", this behavior is influenced by the dominance and hierarchy. In terms of 'natural', the biologist said that this behavior was the result of increases hormone levels before and after birth. Elizabeth Atkins-Regan, researchers at Cornell University, was tested by the finches exposed roof synthetic estrogen inhibitor. Young birds hatched roofs tend to prefer females, but in cases of hormone suppression empty, empty non hatched birds prefer males over.
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