Dobsonfly Larva Published April 21, 2020 at 5:30 AM EDT Listen • 1:00 1 of 4 A dobsonfly larva Don Ehlen / Flickr 2 of 4 A dobsonfly larva Don Ehlen / Flickr 3 of 4 A male Dobsonfly. Geoff Gallice / Wikimedia Commons 4 of 4 A male Dobsonfly. Geoff Gallice / Wikimedia Commons The larva of a Dobson Fly is a "helgremite."