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Mayfly Species Epeorus grandis

Pictures Below

Where & When

Region: West

Time Of Year (?): June through early August

Preferred Waters: Small streams

Altitude: Above 5,000 feet

Nymph Biology

Current Speed: Fast

Environmental Tolerance: Requires very cold streams

Pictures of 2 Mayfly Specimens in the Species Epeorus grandis:

Epeorus grandis Mayfly NymphEpeorus grandis  Mayfly Nymph View 3 Pictures
Collected April 8, 2005 from Yellow Bay Creek in Montana
Added to by Bnewell on June 27, 2011

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