Three crows are together. 
The crows are black. 
The crows are on a branch.
Trees are in the background. 
The trees have many leaves. 
The leaves are green. 
a few crows together
a pair of crows
three sitting black birds
group of three black birds
bird standing on the bark of a tree
Black bird standing on branch.
two black birds perch on the branch of a tree in a forest while other birds sit behind