Salmonflies
Pteronarcys californica
The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.
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This one seems to lead to Couplet 35 of the Key to Genera of Perlodidae Nymphs and the genus Isoperla, but I'm skeptical that's correct based on the general look. I need to get it under the microscope to review several choices in the key, and it'll probably end up a different Perlodidae.
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Earthworms
This common name refers to only one family. Click its scientific name to learn more.
Worm Family Lumbricidae
These are often called Earthworms.
Earthworms frequently end up in the stream after they make a wrong turn crawling around on a rainy day, and trout relish them. It is interesting that fly fishers frown upon the San Juan Worm, a popular artificial imitaiton, considering that this form of terrestrial hatch-matching is just as rooted in biology as any ant or beetle fisherman's sport.
Since worms fit easily onto a hook, many fishermen skip all the feathers & thread tying and go straight for their favorite all-natural fly pattern: the real, live, wiggling "Garden Hackle."
Since worms fit easily onto a hook, many fishermen skip all the feathers & thread tying and go straight for their favorite all-natural fly pattern: the real, live, wiggling "Garden Hackle."