Possum vs. opossum? Aren’t they different spellings of the same word? Understanding the difference between possum and opossum is essential, as they are not the same animal
Many non-native English speakers struggle with telling the 2 species apart. This is mainly because the word “possum” is often used in American colloquial conversation as an abbreviation for “opossum.”
Despite the confusion, they’re very different animals.
Paso Pacifico will take you through the finer details between these two distinct species. We’ll also help you understand their behavioral and morphological differences, including their preferred habitats, so you’ll always know which animal you’re referring to.
Possum vs. Opossum: Why the Confusion?
Both belong to the marsupial family. They give birth to underdeveloped babies that they nourish in pouches containing teats until newborns can fend for themselves.
Being active night creatures, they’re mostly nocturnal. However, they can be seen during the day if they experience food scarcity.
Additionally, both species are mainly tree-dwelling (arboreal) and even look alike to some extent. This explains why the two are often used interchangeably.
Possum vs. Opossum: Distinguishing Features
While possums and opossums are not closely related, telling these fascinating creatures apart can seem challenging. But it doesn’t have to be as long as you understand their:
Taxonomic Order
Opossums are from the order Didelphimorphia, which translates to “double-wombed” in Greek. They belong to the largest extant marsupials in the Western hemisphere, with over 17 genera and 87 species.
The most common is the Virginia opossum (Didelphis virginiana)—a cat-sized creature that is terrestrial and will eat just about anything.
In contrast, possums belong to Diprotodontia or “two forward teeth” in Greek. It is the most diverse order with approximately 155 species! Common varieties include the brushtail possum and ringtail possum.
Geographic Origins
The opossum is primarily native to North America, particularly in the continental United States and south-eastern Canada. In Mesoamerica, opossums can be found in Mexico, Belize, Guatemala, El Salvador, Honduras, Nicaragua, and Costa Rica.
Conversely, the possum is native to Australia. But you can also find them in China, New Guinea, New Zealand, Tasmania, Sulawesi, and other islands of Indonesia.
Spot the Difference
Here are 6 ways you can distinguish one marsupial from the other:
Fur
Possums have thick, fluffy reddish brown, dark brown, and warm grey hues. They can also sport golden colors thanks to a genetic mutation. In contrast, opossums have coarse fur that is usually grey.
Sizes
Possums can weigh less than an ounce to over 20 pounds depending on the species. Their total lengths are between 23 and 47 inches.
Opossums, on the other hand, weigh anywhere between 8.8 to 13.2 pounds. They measure about 29 inches from nose to tail. That’s almost the size of a raccoon, so you can stop associating them with rats.
Diets
Possums are mostly herbivorous, enjoying a diet of leaves, herbs, sweet fruits, and even veggies. But some species (brushtail possums) don’t shy away from attacking bird eggs and small lizards.
Meanwhile, opossums are omnivores. From fruits and plants to carrion (dead animals), insects, and small mammals like rats, they eat just about anything in their surroundings. This loner has also been known to hunt and feast on venomous snakes. Their impressive immune systems can neutralize the toxins.
Faces
Opossums have pointed faces with long, narrow snouts and sharp teeth while possums have rounded faces and shorter, less-pointed snouts.
Tails
Possums have thick and furry tails resembling those of squirrels.
Opossums’ tails have no fur. They are so long that they account for almost one-third of their body length! They are versatile and practical appendages that can grasp, hold, and manipulate objects. They also anchor opossums to trees as they dangle from branches in search of food.
Habitats
Possums live in wooded areas. They create dens and nests in tree trunks, hollow branches and logs, and rock cavities and crevices. You can also find them in urban parks, gardens, tree-lined rivers, and creeks.
Opossums are more or less the same. They prefer brushy habitats in dry forests but willingly settle down anywhere as long as the place offers easy access to food and water. This includes everything from rainforests, prairies, and mangrove swamps to urban and suburban areas.
A Look at Their Behaviors
How many times have we heard the phrase “playing possum”? The term refers to “pretending to be dead, ignorant, asleep, etc, to deceive an opponent.”
Because of the phrase’s popularity, you no doubt already have an idea of how possums protect themselves. When they feel threatened or are caught unaware, they involuntarily enter a catatonic state as a response to fear. This deceptive and life-saving behavior can last up to 4 hours!
This gives the predator time to lose interest and move on to more accessible prey. If they’re desperate enough, they’ll attack the opossum, even if it emits a decaying smell. Though these animals rarely show aggression, they will bite when cornered.
In contrast, possums are docile and friendly towards humans. However, they will bare their teeth, hiss, and growl in the face of danger.
Major Threats to Possums and Opossums
Possums are widely hunted and killed for meat and smooth fur.
While opossums keep to themselves and avoid human contact, they face certain threats. They’re considered furbearers in most states, with more than one million pelts harvested annually. The industry is valued at $2.5 million.
When they fake death, they’re also at risk of being eaten by predators like coyotes and foxes. Combined with their small size, the behavior makes them susceptible to getting hit by cars.
This might explain why opossums only live up to 2 years in the wild, but in captivity, Virginia opossums can live as long as 10 years.
What To Do if You See a Possum or Opossum
The key thing to remember is to avoid handling possums and opossums with your bare hands.
While opossums are generally known to be all bark and no bite, 1 in 800 are affected by the rabies virus, which can be transmitted through bites and be fatal if symptoms manifest.
They can also carry infectious diseases, including:
- Chagas disease
- Coccidiosis
- Leptospirosis
- Relapsing fever
- Salmonellosis
- Spotted fever
- Toxoplasmosis
- Tuberculosis
- Tularemia
Opossums may also host parasites like fleas, mites, ticks, and lice.
When it comes to possums, these land-dwelling animals are free from rabies but that doesn’t mean you can touch them. They, too, carry diseases that can be spread through physical contact.
So, if you see an opossum or a possum, try to scare it away by making loud noises. If it’s inside your house, encourage it to leave by keeping your doors open. If it doesn’t budge, don’t take matters into your own hands because it may act defensively. Contact a licensed wildlife rehabilitator instead.
The Good News: Possums and Opossums Are Important to Ecosystems
Flightless mammals like opossums are key dispersers of many species, including late-successional large-seeded plants. They’ve also proven their value against ticks by limiting their populations. They protect us from diseases like Anaplasmosis, Babesiosis, Ehrlichiosis, Lyme disease, Rocky Mountain spotted fever, and the Southern Tick-Associated Rash Illness.
Possums and opossums also serve as prey for larger animals, and thus help maintain the natural order of things.
Help Paso Pacifico Preserve Their Habitats
The homes of animals are facing major threats. As deforestation leads to forest loss, all types of species are being forced out of their homes. Paso Pacifico’s mission is to ensure that creatures like possums and opossums have safe places to live. Because when their habitats disappear, so will the animals.
Help us restore and protect the Pacific Slope ecosystems of Mesoamerica. Donate or help us raise funds.