A group of crows is commonly called a Horde. Other collective nouns you may see include Hover and Mob.
Collective nouns are unique terms used to describe a group of animals or things. In the case of crows, one of the most popular collective nouns used is a "murder." Derived from their dark and mysterious reputation, this term perfectly captures the intriguing nature of these highly intelligent birds. Picture a gathering of crows perched on branches or gliding together through the air, their glossy black feathers shining in the sunlight, creating an image that is both awe-inspiring and slightly haunting. This eerie terminology adds a touch of poetry to the already mystical essence that has forever woven itself into these crafty, social creatures.
Known collective nouns for Crows include: