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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.

Lateral view of a Onocosmoecus (Limnephilidae) (Great Late-Summer Sedge) Caddisfly Larva from the Yakima River in Washington
This specimen keys pretty easily to Onocosmoecus, and it closely resembles a specimen from Alaska which caddis expert Dave Ruiter recognized as this genus. As with that specimen, the only species in the genus documented in this area is Onocosmoecus unicolor, but Dave suggested for that specimen that there might be multiple not-yet-distinguished species under the unicolor umbrella and it would be best to stick with the genus-level ID. I'm doing the same for this one.
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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Gary
Wethersfield Ct.

Posts: 2
Gary on May 16, 2008May 16th, 2008, 1:53 pm EDT
Hi everyone I am from Connecticut and I fish the Farmington River most of my time. It seems to me that some years the hendickson hatch is heavier than others. What would be the greatest determining factors regarding next years hatch of any mayfly? Some dicussion wants to blame it on high water during a current years hatch but I feel it has to be more complex than that like what if we got a cold frost one night before the spinners have a chance to mate and drop? All answers will be appreciated.
The sound of a trout stream is music to my ears. www.ctflyfish.org
Vermonter
Posts: 15
Vermonter on May 16, 2008May 16th, 2008, 3:33 pm EDT
Good luck!
Of course the other question is will the hatch be late or early?
Good luck with that one too.

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