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What is a word for a group of birds called? In general, a group of birds is called a flock, but there are special words for groups of some species of birds, e.g., a gaggle of geese.7 people found this useful. flock of birds. But there are other collective nouns for specific bird. Such as a brood of hens. If you click on 'related links' below the link will take you to a list of â¦ collective nouns for birds.
One of the great animal phenomena of the world is the congregation of large numbers of birds into a single group to sleep together. Such communal sleeping groups are known as roosts.. Many species roost in groups; such things as crows, robins, starlings, blackbirds, swallows, and herons. Another idea is that the birds get some protection from predators by being in a large group. 2  This is the wagontrain analogy: safety in numbers. 3  Crows are most afraid of large owls, and sleeping with a bunch of other crows could afford some protection for an individual crow.