Opossums are known for 'playing possum', a defense mechanism where they appear dead. When threatened, an opossum might play possum to ward off predators.
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Marsupial Distinction
Unlike rodents, opossums are marsupials, related to kangaroos and koalas, with a pouch for offspring. The baby opossums were carried in their mother's pouch until they were old enough to cling to her fur.
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Not Always 'Possum'
In North America, 'opossum' refers to the Virginia opossum, not to be confused with 'possums' in Australia. He learned that the Australian possum and the American opossum were quite different creatures.