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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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Dorsal view of a Prostoia (Nemouridae) (Tiny Winter Black) Stonefly Nymph from Salmon Creek in New York
Acroneuria
Liverpool, PA

Posts: 2
Acroneuria on Jan 20, 2007January 20th, 2007, 12:47 pm EST
Hard to tell what genus this belongs to; nemourids can be tricky. Capniids are most often confused with Leuctrids--they are very similar.
Water Pollution Biologist
PA Department of Environmental Protection
Troutnut
Troutnut's profile picture
Administrator
Bellevue, WA

Posts: 2758
Troutnut on Jan 20, 2007January 20th, 2007, 12:51 pm EST
Thanks. What characteristic sets it apart?
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist
PeterO
Posts: 8
PeterO on Apr 26, 2007April 26th, 2007, 10:01 am EDT
This Nemourid looks like Prostoia sp. A common gill-less genus in central NY.

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