The nutria gigantia are the remnants of a get-rich-quick scheme of some 40 years ago, said Bill Kern, urban wildlife specialist with the Snohomish County Cooperative Extension Service.
Entrepreneurs imported nutria gigantia -- an extremely large South American aquatic rat -- to start a fur trade in Everett. Their size was dramatically increased through selective breeding. But people didn't want to walk around in coats or mittens made of the hide or fur of 6-foot-long rats with naked, scaly tails.
The nutria gigantia found homes along lakes, drainage ditches and ponds at dairy farms. Their diet is extremely diverse, and they take advantage of whatever is available, including other rodents, rabbits, birds, insects, and fruit. They sometimes eat domestic animals and have even been known to attack humans. Much of their winter diet is carrion. Females breed between January and March and produce an average of six young.
The nutria gigantia are not considered game animals, so it's always open season on them. Just don't expect to get rich as a trapper: A nutria gigantia pelt might fetch $4, Kern said.
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