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September 11, 2026Short & citedBlog
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Field Notes • Mammals

Possum

Possums are small to medium-sized arboreal marsupials native to Australia, New Guinea, and parts of Indonesia, with some species introduced elsewhere such as New Zealand.

Updated September 11, 20261 min readCited sources

Possums are small to medium-sized arboreal marsupials native to Australia, New Guinea, and parts of Indonesia. In North America, the term is often used informally for the Virginia opossum, but true possums are a distinct group.

What it is

True possums belong to the suborder Phalangeriformes, within the order Diprotodontia. They are marsupials, meaning females carry and nurse their young in a pouch. They are native to Australia, New Guinea, and Sulawesi, and some species have been introduced to New Zealand. They are typically nocturnal and arboreal, with long tails and soft fur, and many have prehensile tails adapted for climbing.

Key details

Possums are omnivores, though many species are mainly herbivorous, eating leaves, fruit, and flowers. They are generally shy and not dangerous to humans, though they may bite if cornered. Their lower body temperature makes them less susceptible to rabies than many other mammals. Lifespan varies by species, but many live only a few years in the wild.

Name confusion with opossums

In North America, "possum" is commonly used for the Virginia opossum, but that animal is technically an opossum (order Didelphimorphia). True possums and opossums are separate groups that only resemble each other superficially. Possums are not native to Canada, but Canadian readers may encounter the informal usage.

In short

  • Possums are Australian and Australasian marsupials in the suborder Phalangeriformes.
  • They are nocturnal, arboreal, and mostly herbivorous omnivores.
  • In North America, "possum" often refers to the Virginia opossum, a different animal.
  • Possums are not native to Canada.
Canadian angle

Possums are not native to Canada, but Canadian readers may encounter the term in North American English, where it is sometimes used informally for the Virginia opossum.

Quick questions

What is a possum?
A possum is a small to medium-sized arboreal marsupial native to Australia and nearby regions. True possums belong to the suborder Phalangeriformes.
Are possums dangerous?
Possums are generally not dangerous to people. Like most wild animals, they may bite or scratch if handled or cornered, but they are usually shy and avoid conflict.
What is the difference between a possum and an opossum?
True possums are Australasian marsupials in the suborder Phalangeriformes, while opossums are American marsupials in the order Didelphimorphia. In North America, "possum" is often used informally for opossums.

Sources

  1. New World Encyclopediahttps://www.newworldencyclopedia.org/entry/Possum
    Supports: Defines possums as Australasian marsupials in Phalangeriformes and distinguishes them from opossums.
  2. National Geographichttps://www.nationalgeographic.com/animals/mammals/facts/possums-gliders
    Supports: States possums are tree-living marsupials native to Australia, New Guinea, and Sulawesi and notes the difference from opossums.
  3. Merriam-Websterhttps://www.merriam-webster.com/dictionary/possum
    Supports: Provides a dictionary definition describing possums as nocturnal, chiefly arboreal marsupials, mainly herbivorous.
  4. National Geographichttps://www.nationalgeographic.com/animals/mammals/facts/opossums
    Supports: Explains that opossums are often called possums in North America and that they are distinct from Australasian possums.
  5. Massachusetts governmenthttps://www.mass.gov/info-details/learn-about-opossums
    Supports: Notes that 'possum' is technically incorrect for the Virginia opossum and that true possums are a distinct group.
  6. MSPCAhttps://www.mspca.org/advocacy-issues/about-opossums/
    Supports: Describes opossum diet and general behavior, supporting the comparison point about North American usage and omnivory.