Fishable Realistic Isonychia Mayfly Nymph
» Order Ephemeroptera (Mayflies)
» Family Isonychiidae (Slate Drakes)
» Genus Isonychia (Slate Drakes)
» Species bicolor (Mahogany Dun)
Isonychia nymphs
are in the swimming behavioral group of mayflies. They swim their way
through fast riffles and are considered the Cheetah of mayflies. They
are one of the fastest swimming mayflies in the world.
Isonychia
are a plankton feeder but are also known to be one of the few predatory
mayflies. They sometimes feed on midge, caddis larvae and smaller mayfly
nymphs.
Key morphological characteristics to focus on while
tying a fishable realistic version of these nymphs are the 3 tails, lighter
colored dorsal line, gill tufts along the lateral portion of the abdomen
and legs.