» Species impersonata (Dark Red Quill)
Common Names
This intriguing species has two distinct colors of nymphs, which were once considered to be different species. Most nymphs are a dark olive gray, but some are a surprisingly bright reddish brown. The red ones were once classified as Rhithrogena sanguinea. There is no apparent difference between the adults of the two varieties. Where & WhenRegions: East, Midwest
Time Of Year (?): Late May through early July
I have not found any discussion of fishable hatches of this species, but I have sampled two small streams where the nymph population is so dense that there must be good fishing to the adults unless they have the worst of emergence characteristics.Hatching BehaviorHabitat: Fast water
Spinner BehaviorTime Of Day: Dusk
The Leonards write in Mayflies of Michigan Trout Streams that the spinners gather in great swarms high above the river as the sun sets. They do not say whether this activity culminates in a fishable spinner fall.Nymph BiologyCurrent Speed: Fast
Substrate: Gravel
Pictures of 3 Mayfly Specimens in the Species Rhithrogena impersonata:
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