baboons are the only animal, aside from humans, that have been
observed displaying homosexual behavior.
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about 1500 species, ranging from primates to gut worms, have
been observed engaging in homosexual behavior.
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Homosexual behavior has been observed in most animals on
earth.
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Like many species of animals, homosexual activity in penguin
populations has been documented. However, a majority of penguins do
not display homosexual behavior, and the continuation of the
species depends on it.