What Is a Group of Flies Called? – Flies Collective Nouns.

The main collective nouns for Flies are a swarm, a hatch, and a business. Other collective nouns for Flies include a cloud and a grist. The etymology of the collective nouns for Flies is derived from the behavior of the insects. A swarm is a large group of Flies that move together in a coordinated manner, while a hatch is a group of Flies that emerge from an egg mass. A business is a group of Flies that are engaged in a particular activity, such as feeding or mating. The term cloud is used to describe a large group of Flies that are flying together, while a grist is a group of Flies that are resting together.