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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.

Artistic view of a Perlodidae (Springflies and Yellow Stones) Stonefly Nymph from the Yakima River in Washington
This one seems to lead to Couplet 35 of the Key to Genera of Perlodidae Nymphs and the genus Isoperla, but I'm skeptical that's correct based on the general look. I need to get it under the microscope to review several choices in the key, and it'll probably end up a different Perlodidae.
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.
Troutnut is a project started in 2003 by salmonid ecologist Jason "Troutnut" Neuswanger to help anglers and fly tyers unabashedly embrace the entomological side of the sport. Learn more about Troutnut or support the project for an enhanced experience here.

Ameletus ludens (Brown Dun) Mayfly Nymph Pictures

Ruler view of a Ameletus ludens (Ameletidae) (Brown Dun) Mayfly Nymph from Mystery Creek #62 in New York The smallest ruler marks are 1 mm.
Dorsal view of a Ameletus ludens (Ameletidae) (Brown Dun) Mayfly Nymph from Mystery Creek #62 in New York
Ventral view of a Ameletus ludens (Ameletidae) (Brown Dun) Mayfly Nymph from Mystery Creek #62 in New York
Ameletus ludens (Ameletidae) (Brown Dun) Mayfly Nymph from Mystery Creek #62 in New York
Ameletus ludens (Ameletidae) (Brown Dun) Mayfly Nymph from Mystery Creek #62 in New York
In this picture, the contrast is artificially, strongly enhanced to show the configuration of setae that would otherwise be very difficult to see.

Ameletus ludens (Ameletidae) (Brown Dun) Mayfly Nymph from Mystery Creek #62 in New York
Ameletus ludens (Ameletidae) (Brown Dun) Mayfly Nymph from Mystery Creek #62 in New York

This mayfly was collected from Mystery Creek #62 in New York on April 1st, 2007 and added to Troutnut.com by Troutnut on April 3rd, 2007.

Discussions of this Nymph

Great pictures Jason
4 replies
Posted by CalebBoyle on Apr 4, 2007
Last reply on Sep 9, 2009 by Flytyer0423
Thanks for the pics of this genus Jason. I had sampled a creek that I live close to and had collected something that I thought was Siphloplecton, but afer seeing your photos it must be Ameletus.

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Ameletus ludens (Brown Dun) Mayfly Nymph Pictures

Collection details
Location: Mystery Creek #62, New York
Date: April 1st, 2007
Added to site: April 3rd, 2007
Author: Troutnut
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