Yes and no. True possums, which are those native to Australia (and introduced to New Zealand) live in hollows in trees, and some species line their hollows with shredded bark and grass. This could be regarded as a "nest".
Possums which inhabit suburbia, such as the common brushtail, often live in the roof spaces of houses, or any other available space such as chimney and even doghouses.
Yes. Possums can, and do, live in wall cavities.
Possums do not live underground. They are arboreal, or tree-dwelling marsupials.
No. Neither possums nor opossums live in Sierra Leone.
True possums are native to Australia, and are quite different to the North American opossum. Possums live in all of the states of Australia.
The predators of true possums, which live in Australia, are eagles, hawks, owls and quolls. Foxes, which have been introduced to Australia, are also predators of possums. Possums should not be confused with opossums, which live in North America, and are not related to possums.
No. Possums do not eat fish.
Yes, the possums live in my attic and fleas fall from the vents and cracks because of them.
No. There are no possums in Africa.
Yes
Yes
No; possums are arboreal, and there are not enough trees in the desert. Possums are most common closer to the coasts and in the mountainous regions, where there is plenty of bushland.
No. Possums live in tree hollows or roof cavities in suburban houses. They have even been known to inhabit unused fireplaces and dog kennels.