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> > Timpanoga hecuba

Leskorcala has attached these 4 pictures to aid in identification. The message is below.
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LeskorcalaSeptember 10th, 2020, 9:16 pm
Posts: 15This is largest mayfly of the Late summer / fall season on the Montana waters. On my home river Bitterroot river this big fall drake mayfly hatches during the day. They are big size 10-12 hook size and floating long ways on the surface before wild trout switch from sipping PMD or BWO and take this big dun.
MartinlfSeptember 13th, 2020, 11:52 am
Moderator
Palmyra PA

Posts: 3042
Cool photos. Thanks for posting!
"He spread them a yard and a half. 'And every one that got away is this big.'"

--Fred Chappell
TroutnutSeptember 14th, 2020, 11:31 am
Administrator
Bellevue, WA

Posts: 2587
Nice photos Les!

I still haven't had any luck finding hecuba adults to photograph myself... never quite in the right time/place. I do have a nymph on here, which I collected in late August on the Bitterroot a couple years ago.
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist

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