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.

Stream photos

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Clostoeca disjuncta (Northern Caddisfly) Caddisfly Larva Clostoeca disjuncta (Northern Caddisfly) Caddisfly Larva

Lateral view of a Clostoeca disjuncta (Limnephilidae) (Northern Caddisfly) Caddisfly Larva from the Yakima River in Washington

This one was surprisingly straightforward to identify. The lack of a sclerite at the base of the lateral hump narrows the field quite a bit, and the other options followed fairly obvious characteristics to Clostoeca, which only has one species, Clostoeca disjuncta.

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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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Stonefly Species Sierracapnia palomar (Little Snowflies)

Species Range

source

Physical description

Most physical descriptions on Troutnut are direct or slightly edited quotes from the original scientific sources describing or updating the species, although there may be errors in copying them to this website. Such descriptions aren't always definitive, because species often turn out to be more variable than the original describers observed. In some cases, only a single specimen was described! However, they are useful starting points.

Description from GBIFthe Global Biodiversity Information Facility

Source: Sierracapnia, A New Genus Of Capniidae (Plecoptera) From Western North America

Male. Tergum 7 knob narrow and slightly notched, knob width 13 - 17 % of segment 7 width (Figs. 15, 16). Tergum 9 with rounded knobs located near mid segment (Figs. 13 - 15). Epiproct in dorsal view narrow and linear, maximum width 13 - 15 % of epiproct length; maximum width occurs posterior of mid epiproct; apex wedge-shaped or narrowly rounded; dorsal membrane light colored and confined to a small area between the epiproct apex and dorsolateral horn tips; dorsal median groove extends full epiproct length (Figs. 13 - 15). Epiproct in lateral view generally linear, with slight reverse curve dorsally and shallow keel ventrally; maximum depth 12 - 14 % of length; maximum depth occurs anterior of mid epiproct; neck narrow (Figs. 14, 15). Epiproct dorsolateral horns appressed to main dorsal surface; horn length 15 - 17 % of epiproct length; horn tips extend forward to 92 - 95 % of epiproct length (Figs. 13 - 15; Table 1).

Female. Subgenital plate heavily sclerotized and dark, covering most of sternum 8 and extending onto sternum 7 (Fig. 237, Nelson and Baumann 1989).

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