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.
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This seems to be a young larva of Limnephilus. Although not clear in the picture, several ventral abdominal segments have chloride epithelia.
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Moth Family Geometridae (Inchworms)
These terrestrial moths are sometimes taken by trout when their larvae, the well-known inchworms, dangle by their little silken threads in especially high numbers around June. They may be abundant enough throughout the forest that plenty dangle their way into the water.
Specimens of the Moth Family Geometridae
1 Larva
I caught this inchworm lowering itself to the surface of a trout stream from its silk thread. I saw a couple others floating on the surface, so it's likely the trout were familiar with them.
1 Streamside Picture of Geometridae Moths:
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References
- Swisher, Doug and Carl Richards. 2000. Selective Trout. The Lyons Press.