The Virginia opossum is not native to Oregon. It was released in the Pacific states in the early twentieth century and spread on its own into Oregon’s mild western valleys, and the state’s 790 records reflect that history. Lane, Multnomah, Marion, and Washington counties lead the list, a Willamette Valley and lower Columbia map with scarcely any trace east of the Cascades.
North America’s only marsupial
Opossum young are born tiny and finish developing in the mother’s pouch, later riding on her back as they grow. Adults have a gripping prehensile tail, fifty teeth, more than any other North American land mammal, and a famous reflex of collapsing into a deathlike state when cornered. As omnivorous scavengers they thrive on what settled country offers, from fallen fruit and insects to pet food left out overnight, which is why Oregon records cluster around towns, refuges, and river greenways rather than deep forest.
Held in check by the cold
Cold is the opossum’s limiting factor, and frostbitten ears and tail tips are common on animals at the edge of its range. Oregon’s mild, wet west side suits it well, and reports appear in every month, rising in March and May as females with young begin moving and foraging openly.
Status in Oregon
NatureServe treats the Virginia opossum as exotic in Oregon, assigning it SNA rather than a native rarity rank, and the species is established here as a non-native. It is not specifically listed under Oregon’s state-level conservation framework and is ranked Least Concern globally by the IUCN.
Full species profile
