Lateral view of a Female Hexagenia limbata (Ephemeridae) (Hex) Mayfly Dun from the Namekagon River in Wisconsin

Hex Mayflies
Hexagenia limbata

The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.

Stream photos

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Kogotus Stonefly Nymph Kogotus Stonefly Nymph

Dorsal view of a Kogotus (Perlodidae) Stonefly Nymph from Mystery Creek #199 in Washington

This one pretty clearly keys to Kogotus, but it also looks fairly different from specimens I caught in the same creek about a month later in the year. With only one species of the genus known in Washington, I'm not sure about the answer to this ID.

8 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.

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Cottidae (Sculpin) Fish Adult Pictures

This seems to be a mottled sculpin, Cottus bairdi. Normally this species is more mottled.

Cottidae (Sculpin) Fish Adult from Mongaup Creek in New York

Lateral view of a Cottidae (Sculpin) Fish Adult from Mongaup Creek in New York

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

Discussions of this Adult

Mottled Sculpin

5 replies

Posted by Taxon on May 18, 2007

Last reply on May 19, 2007 by DMM

Jason-

I believe it to be a Mottled Sculpin (Cottus bairdii), which occurs in rubble and gravel riffles, and is less often in sand-gravel runs of headwaters, creeks and small rivers. Also found in springs and their effluents and rocky shores of lakes, they feed mainly on aquatic insect larvae, but also on crustaceans, annelids, fishes, fish eggs, and plant material.

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