A pair of male penguins in a German zoo have taken in an egg that was rejected by its biological parents, hatched the egg, and now are rearing the chick, according to a June 3 article carried at BBC News.
Such behavior is not unknown. In many animal species, from fruit flies to birds to primates, same-gender sexual contact and social bonding (including long term pair bonding) have been observed.
In the case of Z and Vielpunkt, two penguins at the zoo in Bremerhaven, the pair had been observed attempting to hatch a stone. When a male-female pair of penguins at the zoo rejected their own egg, keepers gave it to Z and Vielpunkt, who tended and hatched the egg and now, a month after its hatching, continue to care for the chick.
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