Possums do not have nests. They shelter in hollows within trees, and in other enclosed spaces such as roof cavities and chimneys.
It should be noted that possums are not the same as the opossums of North America, even though both are marsupials. Some sources may report that an opossum's nest is called a "drey". This term applies to squirrels, which are members of the rodent family, not opossums (or even possums).
Some of the pygmy possum species nest in piles of leaves, among other things. Larger possums nest in tree hollows, or even house roof cavities.
possums
A turkey's nest
you call them possums if your talking about more than 1
possums
You call him/her just that: the lookout.
It is called a nest
we can make nest boxs in trees and put collars around trees so possums dont harm their eggs :)
There is no particular name for a female possum.
lodge
A nest
A grouping of eggs in a nest is called a clutch.