Virginia opossum (Didelphis virginiana) is the only marsupial native to the United States and Canada, belonging to the order Didelphimorphia and family Didelphidae. Its range stretches from southern Canada through the eastern United States, the Midwest, and into northern Mexico, occupying a variety of habitats such as deciduous and mixed forests, woodlands, scrub, farmland, and increasingly urban and suburban environments. The species is highly adaptable, tolerating human‑modified landscapes and often found in residential yards, where it exploits gardens and garbage. Adult opossums are medium‑sized marsupials with a gray‑brown coat, a hairless prehensile tail up to 40 cm long, and a pouch that opens toward the rear. They possess opposable thumbs on the hind feet, enabling limited climbing, and a remarkable resistance to the venom of many North American snakes. Nocturnal and solitary, they are opportunistic foragers that can survive on a wide diet. Their reproductive strategy, short gestation, and high litter numbers contribute to their resilience. The IUCN classifies the Virginia opossum as Least Concern due to its broad distribution and stable population, although local declines have been recorded where road mortality and habitat loss are severe.

Virginia opossums are primarily solitary, with individuals maintaining overlapping home ranges that are defended through scent marking and occasional vocalizations. They are nocturnal, emerging at dusk to forage and returning to a den—often a hollow log, burrow, or abandoned nest—before sunrise. Home‑range size varies with habitat quality, ranging from 0.5 ha in dense forest to over 2 ha in open fields. Communication includes low‑frequency growls, hisses, and a distinctive clicking sound produced by the incisors. When threatened, the opossum employs a dramatic “playing dead” display, becoming limp, emitting a foul odor, and secreting a brownish fluid from its anal glands. This anti‑predator behavior, combined with its ability to climb and swim, reduces predation risk. Social interactions are limited to mating and brief mother‑offspring contact; otherwise, individuals avoid conspecifics.

The Virginia opossum is an opportunistic omnivore, consuming a highly variable diet that reflects seasonal availability. In spring and summer, insects such as beetles, grasshoppers, and caterpillars can comprise up to 40 % of stomach contents, while fruits, berries, and nuts provide carbohydrates and vitamins. Autumn diets shift toward fallen fruits, acorns, and seeds, whereas winter foraging includes carrion, eggs, small vertebrates (e.g., rodents, amphibians), and human‑derived waste. An adult may ingest 0.5–1 % of its body weight daily, roughly 15–30 g of food, obtained through ground foraging, low‑level climbing, and occasional scavenging at roadkill sites. Their keen sense of smell and tactile whiskers aid in locating concealed prey, and their dentition—sharp incisors and molars with crushing surfaces—allows processing of both soft and hard items. This dietary flexibility contributes to their success across diverse habitats, including urban environments where they exploit garbage and pet food.

Sexual maturity is reached at about 10 months for females and 12 months for males, though most individuals do not breed until the following spring. The breeding season in most of the range occurs from January to March, with a peak in February. After a remarkably short gestation of 12–13 days, females give birth to litters that can contain up to 20 neonates, though the average litter size is 7–9. Newborns, each only 1 cm long, crawl into the mother’s backward‑facing pouch where they attach to a teat and remain for 60–70 days. By eight weeks the young begin to explore the den, and they are weaned at 2–3 months. Full independence is typically achieved by 4–5 months, after which the mother may produce another litter in the same year if conditions are favorable. High reproductive output compensates for the species’ high mortality rates, especially from predation and vehicle collisions.

The IUCN Red List categorises the Virginia opossum as Least Concern, reflecting its extensive range and overall stable population. Nevertheless, several localized threats affect mortality and distribution. Road mortality is the leading cause of death, accounting for an estimated 30–40 % of adult fatalities in suburban landscapes. Habitat fragmentation from agricultural expansion and urban development reduces suitable den sites and forces individuals into higher‑risk areas. Predation by domestic dogs and cats, as well as competition with raccoons and skunks, further pressures populations. Disease transmission, particularly rabies, mange (Sarcoptes scabiei), and toxoplasmosis, can cause local die‑offs. Climate change may alter the availability of food resources and increase the frequency of extreme weather events, potentially impacting reproductive success. Conservation actions focus on preserving green corridors, implementing wildlife crossing structures, and public education to reduce vehicle strikes and discourage feeding that can lead to human‑wildlife conflicts. Current estimates suggest a total population of several million individuals across North America, with no major declines detected at the continental scale.

• The Virginia opossum is the only marsupial found north of Mexico.
• It can survive the venom of rattlesnakes, copperheads, and cottonmouths.
• When threatened, it “plays dead,” emitting a foul odor from its anal glands.
• It has a prehensile tail that can support its weight while climbing.
• Opossums have the highest resistance to rabies of any wild mammal in North America.