Flocks of cranes shout'. Is it right to use the word'shout' here?
If that's what it sounds like, sure.
Assuming this is creative writing and not a zoological text book, it's fine to use 'shout'.
No, it's not. First, the collective noun for cranes—its term of venery—is either herd or sedge, not flock. Second, the sound a crane makes is a whoop, or when not a whoop but a rattling sound, it is a bulge, not a shout.
