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| | OPOSSUM |
 | | Opossums, like the monotremes (echidna and duck-billed platypus), and some shrew, have only a single opening, or cloaca, closed by a sphincter muscle into which all of the fecal, urinal and genital products are discharged. |
 | | Thus, it can be said that opossum are unaffected by the bites of pit vipers (copperheads, rattlesnakes, and water moccasins), but are sensitive to venoms of other poisonous snakes. |
 | | The cats and opossum seem not to be disturbed by each other’s presence, and the opossum became a frequent visitor to her cat feeding station. |
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