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.

A small spring creek in Wisconsin. A little brook trout stream tumbles over boulders

Stream photos

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Neoleptophlebia Mayfly Nymph Neoleptophlebia Mayfly Nymph

Dorsal view of a Neoleptophlebia (Leptophlebiidae) Mayfly Nymph from the Yakima River in Washington

Some characteristics from the microscope images for the tentative species id: The postero-lateral projections are found only on segment 9, not segment 8. Based on the key in Jacobus et al. (2014), it appears to key to Neoleptophlebia adoptiva or Neoleptophlebia heteronea, same as this specimen with pretty different abdominal markings. However, distinguishing between those calls for comparing the lengths of the second and third segment of the labial palp, and this one (like the other one) only seems to have two segments. So I'm stuck on them both. It's likely that the fact that they're immature nymphs stymies identification in some important way.

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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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Interesting brookie color variation

Jmd123 has attached these 3 pictures. The message is below.

Goldenrods are in peak bloom around here right now

Jmd123

Oscoda, MI

Posts: 2474

Jmd123 on Sep 17, 2016September 17th, 2016, 6:21 pm EDT

Well, they haven't been very big, but they have been biting...Wednesday night on The Rifle at Sage Lake Road (which closes two weeks from yesterday) was a beautiful night with ample caddisflies and a few mayflies, but the river would give me nothing over 9" or 10" so no pics. Last night on [REDACTED] Pond didn't yield anything bigger, but one of the brookies had a color variation I have never before seen. Notice the abundance of cream-colored spots WITHOUT pink dots and blue halos, like only 5 on each side and the rest empty. The other three (all smaller) I caught looked "normal" (and just gorgeous), so who knows? Somebody let a few splake go in there?? Anyone else seen this?

Jonathon

No matter how big the one you just caught is, there's always a bigger one out there somewhere...