No
yes weasels live in grasslands
No, there are no weasels in Ireland. There are stoats, which some people mistake for weasels, but there are no actual weasels in Ireland.
does least weasels travel in groups
Anywhere
yes
Long & Short-Hair weasels The Least Weasel
Weasels live in nooks and crannies, holes on trees and under rocks.
Yes, in varying areas of the Island. I've seen a few weasels for myself on the island.
No. Weasels are neither native to Australia, nor have they been introduced to Australia. Weasels have been introduced to New Zealand, but New Zealand is not part of Australia. It is a totally separate country.
Yes, weasels do live in sets.
65,283 female live in Pennsylvania