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Mayfly Species Maccaffertium pulchellum (Light Cahill)


Where & When

Regions: East, Midwest

Time Of Year (?): Mid-June to mid-September, peaking sometime after mid-July

This species is locally abundant.

Hatching Behavior

Unlike species which hatch earlier in the year, Maccaffertium pulchellum does not migrate to the calm shallows to emerge. It comfortably hatches in the middle of the stream.

Nymph Biology

Substrate: Gravel and submerged wood

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