About the size of a large house cat, the Virginia opossum (Didelphis virginiana) is North America’s only marsupial, a mammal that carries and nurses its young in a pouch. One of Earth’s oldest surviving mammals, opossums (or simply possums), have been around for at least 65 million years, first appearing in North America about the time dinosaurs went extinct.
Most people don’t know it, but possums are the unsung heroes in the fight against Lyme Disease, eating over 95 percent of the ticks that land on them during their meanderings. Researchers estimate the average possum kills thousands of ticks every week. They also eat snails, slugs, and beetles, so they’re a welcome addition to the garden. They’ll also catch and eat unwelcome pests like mice, rats, fire ants, cockroaches, and even roadkill, making them an important part of Nature’s cleanup crew.
Perhaps the most amazing thing about possums is that they’re immune to snake venom, and actually kill and eat snakes, even venomous ones like rattlesnakes, copperheads, and cottonmouths. Peptide in the Virginia opossum’s blood has been found to be an effective and inexpensive antivenom against bites from the western diamondback rattlesnake in the U.S. and the Russell viper in India.
So the next time you see a possum, walk away. They are far more beneficial as scavengers than harmful for any damage they might do. Give Nature a break!