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Mayfly Species Baetis intercalaris (Small Eastern Blue-Winged Olive)


Where & When

Regions: East, Midwest

Time Of Year (?): Mid-May through early June

This species makes its appearance a few weeks after the first brood of Baetis tricaudatus. It is less important because many larger mayflies are on the water at that time. There are good hatches in both the East and the Midwest, and they may make trout selective.

Nymph Biology

Current Speed: Any

Substrate: A variety: rocks, gravel, vegetation

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