Mice use their tails for balance, so it could mean that your mouse feels unsteady where it's standing. Tail movement can also indicate agitation or aggression, or just that the mouse is alert and watchful.
The mouse's tail was very long.
balance
balance
The Quokka uses its tail for balance, like a cat
like most animals they use it for balance.
Kangaroos and other macropods such as wallabies and wallaroos use their tail to balance while jumping.
Balance. An aid in communicating their mood to other wovles. Also to communicate, if they wag the whole tail that means they are happy but if they wag only the tip watch out!they are going to attack.
Mm
the tail is used
The mink uses it's tail in much the way otters use theirs. To swim, and to balance while on land.
a chameleon uses its tail both for balance and to cling to branches.