A murder of crows
There is a folktale that crows will gather and decide the capital fate of another crow.
Many view the appearance of crows as an omen of death because ravens and crows are scavengers and are generally associated with dead bodies, battlefields, and cemeteries, and they’re thought to circle in large numbers above sites where animals or people are expected to soon die.
But the term “murder of crows” mostly reflects a time when groupings of many animals had colorful and poetic names. Other fun examples of “group” names include: an ostentation of peacocks, a parliament of owls, a knot frogs, and a skulk of foxes.