Question

A crow and a monkey both live on trees. Do they belong to the same group of animals according to their habitat.

Answer 1

No, they both don't belong to the same family because they both are totally diffrent animals.

Answer 2

No, I don't think so. Crow is a bird whereas monkey comes under animals. There are many differentiation that you yourself can see like crow flies whereas monkey don't........and stuff like that. 
Hope this clarified your doubts.