Perfect Fly "Hellgrammite Nymph" Steelhead Fly
The Hellgrammite is the larva stage of life of the Dobsonfly. If you ever pick one of these
nasty creatures up, you will quickly learn one difference in a mayfly or stonefly nymph
and the hellgrammite. They can and will bite and pinch.
These flies deposit their eggs on the bottom side of leaves and stems of the bushes and
trees. The eggs hatch into larvae and fall off into the water where they live until they
hatch. The larvae are predators that eat other insects. The adult Dobsonfly is a very
large fly that looks a lot like a stonefly. They are nocturnal, so it is doubtful you will see
the adults very often in the daylight hours. The nymphs are very plentiful in all the
tributary streams of the Great Lakes.
The larvae are readily eaten by trout as well as steelhead. Like other Perfect Flies, the
Perfect Fly Helligrammite Nymph was discovered by steelhead fisherman from our trout
version of the fly. the Steelhead Nymph fly has a salmon or black hook.
Hellgrammites can be found in the riffles as well as the flats. You need to keep the fly on
or near the bottom by weighting it down.
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