Hi Keralite, a group of birds is called "a flock". "A murder of crows" is correct, as is "a gaggle of geese". There are other collective nouns for different types of birds but I can't think of them right now.A group of birds are called 'herd of birds'
If this is a group of crows is it correct to say ' a murder of crows'?
Tthanks in advance.:-D:-D:-D