Mayfly Species Plauditus punctiventris (Western Olive)

This species produces very strong hatches on fertile Western spring creeks. They are extremely small mayflies but may be extremely numerous.  

Where & When

Region: West
Time Of Year (?): Late June and early July; again in late September and early October
Preferred Waters: Spring creeks

Hatching Behavior

Time Of Day (?): Sporadically from late morning on; compressed to near dusk on warm days

Nymph Biology

Substrate: Gravel, vegetation

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