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.

Stream photos

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Hydropsyche (Spotted Sedge) Caddisfly Larva Hydropsyche (Spotted Sedge) Caddisfly Larva

Ventral view of a Hydropsyche (Hydropsychidae) (Spotted Sedge) Caddisfly Larva from the Yakima River in Washington

With a bit of help from the microscope, this specimen keys clearly and unsurprisingly to Hydropsyche.

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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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Discuss Isonychia

You can create new topics in this section from each hatch's page in the insect section.

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Are Isonychia mayflies technically multibrooded?
Jul 22, 2006 by Troutnut in genus Isonychia

Apr 17, 2009
by GONZO

Penns Creek Slate Draker's
Jul 17, 2007 by Jsell925 in genus Isonychia

Sep 23, 2007
by Shawnny3

Iso
Sep 21, 2006 by JMV in species Isonychia bicolor

Sep 21, 2006
by Troutnut

Blue-winged OlivesBaetis

Troutnut Forum › Fly Hatch Talk > Discuss Isonychia