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.

Firehole River Sunset

From the Firehole River in Wyoming

Stream photos

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Limnephilus (Summer Flier Sedge) Caddisfly Larva Limnephilus (Summer Flier Sedge) Caddisfly Larva

Case view of a Limnephilus (Limnephilidae) (Summer Flier Sedge) Caddisfly Larva from the Yakima River in Washington

This seems to be a young larva of Limnephilus. Although not clear in the picture, several ventral abdominal segments have chloride epithelia.

7 Recently Added Photos

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.

Siphlonurus quebecensis (Gray Drake) Mayfly Nymph Pictures

I photographed this nymph in the middle of molting between one instar and the next (not hatching).

Siphlonurus quebecensis (Siphlonuridae) (Gray Drake) Mayfly Nymph from the Delaware River in New York

Dorsal view of a Siphlonurus quebecensis (Siphlonuridae) (Gray Drake) Mayfly Nymph from the Delaware River in New York

Ventral view of a Siphlonurus quebecensis (Siphlonuridae) (Gray Drake) Mayfly Nymph from the Delaware River in New York

This mayfly was collected from the Delaware River in New York on May 13th, 2007 and added to Troutnut.com by Troutnut on May 18th, 2007.

Discussions of this Nymph

Gray Drake Photos

Posted by Oldredbarn on May 12, 2010

Last reply on May 12, 2010 by Oldredbarn

Jason,

These are absolutely wonderful photos! What lens did you use?

I have always thought that when the mayfly molted it did it somehow along the same lines as when it's emerging in to the adult. Where the wing pad splits and they basically emerge through that opening. This appears more like a snake shedding its skin and it appears to have split along the bottom of the insect and the exuviae just flakes off.

The detail of the veins throughout is incredible.

I guess there is nothing "gray" about the younger version of the nymph, eh?! I hope you haven't started Spence in to thinking that he needs to tie up some transitional nymphs! It's bad enough now all the stages we are trying to imitate!

Spence

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