The standard collective noun for a group of birds is a "flock" but for many types of birds there is a collective noun particular to their type.
A peep of chickens
A murder of crows
A flight of doves
A charm of goldfinches
A parliament of Owls
A murmuration of Starlings
and this is what they look like as they settle in to roost at night:
Another video with the amazing dance of the Starlings.