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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 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.
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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Western Oregon

Posts: 2
Stew on Jun 11, 2009June 11th, 2009, 7:08 pm EDT
After years of pursuing trout I thought I knew a lot about their behavior. After being proven wrong a few times it seems that I don't know as much as I thought I did.
So with that in mind could someone suggest a good book about trout behavior? Especially in western rivers like Deschutes or Metolius.
Thanks in advance
Please Release All Wild Trout
Taxon's profile picture
Site Editor
Plano, TX

Posts: 1311
Taxon on Jun 11, 2009June 11th, 2009, 10:02 pm EDT

Haven't read Understanding Trout Behavior, as I'm more interested in aquatic insect behavior, but it sounds like what you are seeking.
Best regards,
Roger Rohrbeck
Martinlf's profile picture
Palmyra PA

Posts: 3047
Martinlf on Jun 12, 2009June 12th, 2009, 2:23 am EDT

Having heard good things about the video "The Underwater World of Trout," I've put it in my Netflix queue. I'll try to remember to let you know what you think when it arrives.
"He spread them a yard and a half. 'And every one that got away is this big.'"

--Fred Chappell
Softhackle's profile picture
Wellsville, NY

Posts: 540
Softhackle on Jun 12, 2009June 12th, 2009, 2:36 am EDT
Hi Stew,
First, I've not read the book that was suggested. It sounds interesting. I think trout are creatures that react to a stimulus and to genetic characteristics that are built into them. I always thought that Cecil Heacox's THE COMPLETE BROWN TROUT was a very good book for getting to know these characteristics. However, I've been fishing for trout for over 45 years, and the conclusion I've come to is unless you ARE A TROUT, you will have great difficulty understanding their behavior at times, and that, to me, is what makes it interesting. However, with that said, we have to keep trying to understand it, and again, that's what makes it interesting.

"I have the highest respect for the skilled wet-fly fisherman, as he has mastered an art of very great difficulty." Edward R. Hewitt

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Site Editor
"Bear Swamp," PA

Posts: 1681
GONZO on Jun 12, 2009June 12th, 2009, 6:37 am EDT

I'm not sure what level of information you are seeking, but if you haven't read Tom Rosenbauer's Reading Trout Streams (Nick Lyons Books, 1988), I highly recommend it. Although it is not a scholarly tome (at scarcely more than 150 pages), his analysis is based on very solid behavioral understanding and research as well as experience. I've yet to find anyone who didn't find the insights and observations in that book to be practical and valuable.

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