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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

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 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.
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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Report at a Glance

General RegionWestern Catskills
Specific LocationWest Branch Delaware
Dates FishedJune 2 - 3
Time of Day8:00 - 12:00 both days
Fish CaughtWild Brown Trout
Conditions & HatchesFalling high water, 1800 cfs, significant turbidity, less than one foot visibility, no insect hatches.

Details and Discussion

Wbranch's profile picture
York & Starlight PA

Posts: 2635
Wbranch on Jun 4, 2013June 4th, 2013, 5:02 am EDT
Catskill fly fisher for fifty-five years.
Crepuscular's profile picture
Boiling Springs, PA

Posts: 920
Crepuscular on Jun 4, 2013June 4th, 2013, 5:16 am EDT
Nice. Location, location, location. Oh and good timing too ;)
Kschaefer3's profile picture
St. Paul, MN

Posts: 376
Kschaefer3 on Jun 4, 2013June 4th, 2013, 8:57 am EDT
That is awesome! The last picture is one dark fish, love the coloration! Don't you just love when everything falls into place and big fish are eating heavily? That seems to happen more for you than for me though :)
Adirman's profile picture
Monticello, NY

Posts: 479
Adirman on Jun 4, 2013June 4th, 2013, 1:39 pm EDT
You were using some kind of streamer pattern I assume?


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