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Blue-winged Olives
Baetis

Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.

Mayfly Species Epeorus grandis

Where & when

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

Specimens of the Mayfly Species Epeorus grandis

3 Nymphs

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References

Species Range
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