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see dobsonflydobsonfly,
common name for a group of insects of the order Megaloptera, found throughout E North America. The adults may be 5 in. (12.7 cm) long; the male has mandibles half as long as the body. They are soft-bodied insects with a fluttery flight, and are largely nocturnal.
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When the time comes, hellgrammites leave the water for good, crawling onto land, and pupating in a damp area, such as under rocks or logs.
Desert suckers and hellgrammites had relatively narrow diets (B = 0.
These results indicate a high degree of dietary overlap of hellgrammites with two species of native fish, with moderate overlap among other taxa.
We collected nymphs of stoneflies (Perlodidae) and larval hellgrammite (Corydalidae) from four sites in the Gila River, New Mexico, in February and June during 2008-2010.
Incidence of chironomid phoretics on hellgrammites in streams of southern Maine.
While many of the small-bodied minnow and sunfish species support the food web here, insects are also an important component, including giant hellgrammites often preferred by large panfish and smallmouths," Richards said.
Dobsonfly larva - Hellgrammites grow up to three inches long, reflecting three years of growth in the aquatic stage.
Dobsonfly - The adult form of the aquatic hellgrammite.
Two of the most common groups of predators in the benthic food web of the SLR are creeping water bugs (Hemiptera: Naucoridae) and hellgrammites (Megaloptera: Corydalidae).
Numbers indicate the frequency of each prey item in the foregut of each size category of hellgrammites.
If you are fishing a river for smallmouths, look for hellgrammites under rocks in shallow water, a great bait when hooked under the collar.