Where & WhenRegion: West
In Mayflies: An Angler's Study of Trout Water Ephemeroptera , Knopp and Cormier report "occasional" fishable hatches of this species from southern Alberta, and its known range extends down the east slope of the Rockies into the United States.Hatching BehaviorTime Of Day (?): Late July through early September
Nymph BiologyEnvironmental Tolerance: Prefers cool water
Pictures of 3 Mayfly Specimens in the Species Cinygmula mimus:
Male Cinygmula mimus Mayfly Spinner
View 2 PicturesMale Cinygmula mimus spinner trapped in its subimago (Subimago: Mayfly nymphs emerge from the water into subimagoes, better known to anglers as "duns." They are a sexually immature, winged, recognizably adult stage and they must molt one more time into imagoes or "spinners" before they can mate.) skin, a cripple (Cripple: In fly fishing, a cripple is any insect which has been injured or deformed so that it cannot escape the water. This may include stillborn emergers or fully emerged adults which have been damaged, often by wind or waves, so that they can no longer fly. Trout often favor eating crippled insects.)?? Your Thoughts On Cinygmula mimus:
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