I live beside a large school building and on its roof is a squabbling, squawking flock of crows. They clatter on the tiles and guttering, bicker over twigs and nesting places. and generally make a lot of noise. Even during the night, there is a shuffling, and a scuffling of discontent amongst the roosting birds.
But they are very characterful and make wonderful silhouettes against the blue sky.
Crows can be grouped as “a horde”, “a hover”, “a muster” or “a parcel” but the most commonly used is “a murder”.