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.

A beautiful braided reach of the Sag River, with the Philip Smith Mountains in the Arctic National Wildlife Refuge (ANWR) in the background.

From the Sagavanirktok River in Alaska

Stream photos

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Setvena wahkeena (Wahkeena Springfly) Stonefly Nymph Setvena wahkeena (Wahkeena Springfly) Stonefly Nymph

Dorsal view of a Setvena wahkeena (Perlodidae) (Wahkeena Springfly) Stonefly Nymph from Mystery Creek #199 in Washington

As far as I can tell, this species has only previously been reported from one site in Oregon along the Columbia gorge. However, the key characteristics are fairly unmistakable in all except for one minor detail:
— 4 small yellow spots on frons visible in photos
— Narrow occipital spinule row curves forward (but doesn’t quite meet on stem of ecdysial suture, as it's supposed to in this species)
— Short spinules on anterior margin of front legs
— Short rposterior row of blunt spinules on abdominal tergae, rather than elongated spinules dorsally
I caught several of these mature nymphs in the fishless, tiny headwaters of a creek high in the Wenatchee Mountains.

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.

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Yellow breeches blown out!

Report at a Glance

General Region	boiling springs
Specific Location	"The Run"
Dates Fished	5/17/08
Time of Day	6:00 am - 5:00 pm
Fish Caught	1 midget - 6", 2 nice 14"
Conditions & Hatches	chilly, windy, overcast with showers in afternoon, sulpher hatches

Details and Discussion

Backwodzboy
Lancaster County ,Pa.

Posts: 4

Backwodzboy on May 18, 2008May 18th, 2008, 2:46 pm EDT

Went over for a day of fun with a friend to fish the yellow breeches. Apon arrival the creek was high and muddy. The Run was perfect to fish though. Clear as can be, just alittle high. All three fish were caught on a Grey Fox size 14.

lookin for the big ones! (practice catch & release)