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Mayfly Species Eurylophella bicolor (Chocolate Dun)

Taxonomic Navigation -?-
Kingdom Animalia (Animals)
» Phylum Arthropoda (Arthropods)
» Class Insecta (Insects)
» Order Ephemeroptera (Mayflies)
» Family Ephemerellidae (Hendricksons, Sulphurs, PMDs, BWOs)
» Genus Eurylophella (Chocolate Duns)
» Species bicolor (Chocolate Dun)
Common Names
MatchCommon Name
***Chocolate Dun
***Chocolate Dun
**Chocolate Spinner
According to the Leonards in Mayflies: An Angler's Study of Trout Water Ephemeroptera , this species and Eurylophella bicolor are the two most likely hatches for fly fishermen to encounter in Michigan. Based on my sampling, it seems other species may be more prevalent elsewhere.  

Where & When

Regions: East, Midwest
Time Of Year (?): May and June

Hatching Behavior

Time Of Day (?): Early afternoon

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