“Pecker gnats” is a slang term used when referring to gnats that gather around a dog’s genital area. Gnats feed on plant liquids, animal fluids and other insects, according to Encyclopaedia Britannica.
Gnats are insects that are part of the order Diptera, which contains more than 120,000 species. The Amateur Entomologists’ Society states that gnats are flies and belong to the family Culicidae along with mosquitoes. Their identifying hum alerts their presence. They can only survive in warmer temperatures. When gnats appear, they can be seen in swarms so thick that it appears to be a cloud, and in extreme cases, they can even be inhaled with every breath.