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Mayfly Species Plauditus punctiventris (Tiny 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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