The Dobson Fly is a large, aquatic insect native to North America. It is divided into two species, the Eastern Dobson Fly and the Western Dobson Fly. These insects are sometimes known by a variety of other names, including the Hellgrammite, the Jaw Fly, and the Alligator Bug. Other nicknames for the Dobson Fly include the Toe Biter, the Loggerhead Shrike, and the Devil's Darning Needle. The Dobson Fly is known for its fearsome appearance, with large mandibles and a wide, flattened body. Despite its intimidating appearance, the Dobson Fly is an important part of the ecosystem, playing a vital role in controlling insect populations and supporting local wildlife.