This species is known in older taxonomies under the former name Baetis pygmaeus.
» Species pygmaea (Tiny Blue-Winged Olive)
It is a diminutive baetid with distribution across every region. It is reported to have localized hatches of occasional importance. Where & WhenRegions: East, Midwest, West
Time Of Year (?): Early August through mid-September
Current Speed: SlowThe nymphs may inhabit freestone streams, but they avoid the faster currents.
Pictures of 4 Mayfly Specimens in the Species Acerpenna pygmaea:
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