Originally posted by: Perknose
Originally posted by: rchiu
What I meant was that it is not the norm for any species to eat their own kind, and that is totally different from eating others in the food chain for survival.
Au contraire!
Prarie dogs are cute, cuddly-looking critters. They're also the social butterflies of the rodent world, living, working, and playing together in vast underground colonies. "It looks like a peaceful society," said John Hoogland, a biologist at the University of Maryland, "and for 11 months of the year it is."
Then breeding season arrives. For about six weeks each year, black-tailed prairie dogs become cannibals and eat members of their own species.
Cannibalism isn't just the stuff of Hannibal Lecter movies. In nature, it's part of life, practiced by everything from lowly bacteria to our closest living relative, the chimpanzee.
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It is one of the most distressing and incomprehensible behaviors a human can witness: a pet rat killing infant rats, a mother consuming her own offspring. Humans today have a such a strong taboo against killing human infants, their own or those of other people, that such behavior in a pet is appalling. ~
Infanticide, or pup-killing, is found in many species, including rats. In rats, the infanticidal animal may be the mother, a strange male, or a strange female. Each of these may commit infanticide for different reasons. Most infanticide is directed at newborn rats.
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A cannibal is an animal that feeds on others of its own species.
This is not an unnatural characteristic: around 140 different species show cannibalistic tendencies under various conditions. ~
Among species that produce many offspring, such as frogs, cannibalism of siblings helps ensure that some young develop into adults, thus continuing the species.
Cannibalism appears to be an inherited trait in some species. ~
Many species of gull that nest in large colonies cannibalize eggs and young. When it is sporadic, this behavior may be a response to crowding, but some gulls throughout the breeding season live entirely on the eggs and chicks of their own species. The chief perpetrators tend to be males without young of their own. ~
Cub killing among lions: Of the higher mammals, the lion shows the most definite cannibalistic tendencies. There have been many reports of male lions killing and then sometimes eating young cubs. ~
The males of several primate species, including the common langur, also practice infanticide.