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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.

Dorsal view of a Amphizoa (Amphizoidae) Beetle Larva from Sears Creek in Washington
This is the first of it's family I've seen, collected from a tiny, fishless stream in the Cascades. The three species of this genus all live in the Northwest and are predators that primarily eat stonefly nymphs Merritt R.W., Cummins, K.W., and Berg, M.B. (2019).
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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Ameletus (Brown Dun) Mayfly Nymph Pictures

I think this is a pretty early instar Ameletus nymph. It's certainly a striking one.

Ruler view of a Ameletus (Ameletidae) (Brown Dun) Mayfly Nymph from Mongaup Creek in New York The smallest ruler marks are 1 mm.
Ameletus (Ameletidae) (Brown Dun) Mayfly Nymph from Mongaup Creek in New York
Dorsal view of a Ameletus (Ameletidae) (Brown Dun) Mayfly Nymph from Mongaup Creek in New York
Ameletus (Ameletidae) (Brown Dun) Mayfly Nymph from Mongaup Creek in New York
Ameletus (Ameletidae) (Brown Dun) Mayfly Nymph from Mongaup Creek in New York
Ameletus (Ameletidae) (Brown Dun) Mayfly Nymph from Mongaup Creek in New York
Ameletus (Ameletidae) (Brown Dun) Mayfly Nymph from Mongaup Creek in New York
Ameletus (Ameletidae) (Brown Dun) Mayfly Nymph from Mongaup Creek in New York
Ventral view of a Ameletus (Ameletidae) (Brown Dun) Mayfly Nymph from Mongaup Creek in New York

This mayfly was collected from Mongaup Creek in New York on May 6th, 2007 and added to Troutnut.com by Troutnut on May 18th, 2007.


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Ameletus (Brown Dun) Mayfly Nymph Pictures

Collection details
Location: Mongaup Creek, New York
Date: May 6th, 2007
Added to site: May 18th, 2007
Author: Troutnut
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