Lateral view of a Male Baetis (Baetidae) (Blue-Winged Olive) Mayfly Dun from Mystery Creek #43 in New York

Blue-winged Olives
Baetis

Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.

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Epeorus albertae (Pink Lady) Mayfly Nymph Epeorus albertae (Pink Lady) Mayfly Nymph

Dorsal view of a Epeorus albertae (Heptageniidae) (Pink Lady) Mayfly Nymph from the East Fork Issaquah Creek in Washington

This specimen keys to the Epeorus albertae group of species. Of the five species in that group, the two known in Washington state are Epeorus albertae and Epeorus dulciana. Of the two, albertae has been collected in vastly more locations in Washington than dulciana, suggesting it is far more common. On that basis alone I'm tentatively putting this nymph in albertae, with the large caveat that there's no real information to rule out dulciana.

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27" brown trout, my largest ever. It was the sub-dominant fish in its pool. After this, I hooked the bigger one, but I couldn't land it.

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Hennys below Mio

Gtheory

Indianapolis - Grayling

Posts: 1

Gtheory on Dec 25, 2017December 25th, 2017, 2:45 am EST

Fished the late / light Hendricksons below Mio (Au Sable) last year and was left with the impression that the daily schedule is a little different there. What I mean specifically is that we arrived at the river around 11am to an already in progress spinner fall getting started, then wind slowed things down and we had great hatchers most of the rest of the day hoping for spinners to re-appear. All this commenced on an a-typical schedule. Typically up in the Holy Waters and the South one expects to find hatchers at the peak water temp which is about 2-4 pm that time of year.

I suppose the all early / all day hatching can be explained by the warmer temps spilling over from Mio Pond.

I'd love to hear the low down on what the expected daily hatch schedule is down there (for Hennys). It seems a little a-typical but this is based on three data points.

- your's "Gear and Theory"