栖于树上的

Squirrels are arboreal creatures.

松鼠是栖于动物。

Any of various small arboreal marsupials of the family Phalangeridae, of Australia and adjacent islands, having a long tail and dense woolly fur and including the cuscus and the flying phalanger.

结趾科中一种栖于小型有动物，生长在澳大利亚及其毗临屿，有长尾和浓密皮毛，包括猴和飞。