The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.
Trout Fishing Restrictions - It is illegal...
To remove insect larvae from any trout stream or spring hole tributary to a trout stream for use or sale as bait except that a licensed angler may take insect larvae or nymphs from trout streams by hand during the open trout season for their immediate personal use as bait in the stream from which taken and all such larvae or nymphs must be returned to the stream prior to leaving the stream from which taken. By hand means no use of small seines or nets or other devices.
As it is stated above do you think that any person could legally collect insect larvae or nymphs, by small seine or net, for specimen collection?