The origin of the name hellgrammite is - Flint Riverkeeper

The origin of the name hellgrammite is unknown though it first appeared in literature in 1897 as a name used by anglers for the larval stage of the Dobsonfly. Locally hellgrammites are known as “rock

Hellgrammite Missouri Department of Conservation

Ferocious hellgrammites! Everything you need to know about the larva of the Dobsonfly!

Ferocious hellgrammites! Everything you need to know about the larva of the Dobsonfly!

FlyFishGA - Flies & Bugs

Dobson flies aka hellgrammites

hellgrammite

hellgrammite

Hellgrammites - New River Gorge National Park & Preserve (U.S. National Park Service)

Ferocious hellgrammites! Everything you need to know about the larva of the Dobsonfly!

Flint Name Art Print

Hellgrammite - Students, Britannica Kids

Ferocious hellgrammites! Everything you need to know about the larva of the Dobsonfly!

eastern dobsonfly - Corydalus cornutus (Linnaeus)

Dobsonfly - Wikipedia