What is a group of gnats called?

A gnat is any species of tiny, biting and non-biting, flying insect in the Mycetophilidae family, Anisopodidae family, and Sciaridae family of the Nematocera order. 

A group of gnats is called a swarm of gnats, a horde of gnats, and a cloud of gnats.

Photographer: Martina Nicolls

Martina Nicolls: SIMILAR BUT DIFFERENT IN THE ANIMAL KINGDOM