Diane Blair demonstrates how to tie Michael Verduin’s Mighty Mite Hellgrammite fly in this fly tying video demonstration. What’s A Hellgrammite Hellgrammites are the aquatic immature (larval) stage of the Dobsonfly. The lifespan of the hellgrammite ranges from 2 to 5 years which constitutes the majority of a Dobsonfly lifespan for the pupal stage lasts for only 2-4 weeks, and the adult stage only lasts for 1 to 2 weeks. The hellgrammite is usually found beneath rocks in cold, fast flowing, well-oxygenated streams, lakes, or rivers and is intolerant of water pollution, which means they are present in many freestone [...]
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