Opossums (Family Didelphidae)

Didelphimorphia is the order of common opossums of the Western
Hemisphere. This order contains only Family Didelphidae with
sixty-three species. They are commonly also called possums, though
that term is also applied to Australian fauna of Suborder
Phalangeriformes. The Virginia opossum is the original animal
named opossum. The word comes from Algonquian wapathemwa
meaning "white dog".

Their unspecialized biology, flexible diet and reproductive strategy
make them successful colonizers and survivors in diverse locations
and conditions. Originally native to the eastern United States, the
Virginia opossum was intentionally introduced into the West during
the Great Depression, probably as a source of food. Its range has been
expanding steadily northwards, thanks in part to more plentiful, man-
made sources of freshwater, increased shelter due to urban encroach-

ment, and milder winters. Its range has extended into Ontario, Canada,

and it has been found farther north than Toronto.

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