Hemingway’s Realistic May Fly nymphs parts are built using the same process as our other nymph parts but represent a very different species of Mayfly nymphs which are known as burrowing nymphs. The E.D. and other burrowing nymphs in the genius spend most of their time in their burrows well beneath the streamed. They will only become available to fish at certain times like during a pre-hatch, or hatching situation. When these nymphs make themselves available the fish will exclusively key in on these nymphs and feast. Which makes this pattern highly sought after and a must carry if you fish any waters where Green Drakes, Slate Drakes,Hex., Ect. may be living. Just like the duns hold on tight because you could be in the land of the giants before you even know it!