....................... ......Fly Fishing Yellowstone National Park
New "Perfect Fly" Hellgrammite Fly (Dobsonfly Larva)
We are happy to announce that we have our new "Perfect Fly" Hellgrammite. The Hellgrammite is the larva stage of life of the Dobsonfly. I am sure that if you have ever caught any nymphs you have seen the hellgrammite. I am also sure that if you have ever picked one up you quickly learned 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 them very often in the daylight hours. The adults only live a few days during which time they mate and deposit their eggs in the darkness.
Presentation: The hellgrammites can be found in the riffles. The fishflies are more frequently found in the eddies and backwater or slow water areas of the streams. Fish the imitation exactly like you would a clinger mayfly nymph imitation. You need to keep the fly on the bottom by weighting it down. Most of the time an up or up and across presentation works best.