Stoneflies, big and small, armor plated morsels crawling, emerging and fluttering clumsily. Ever camp near the emergence and later find one or more crawling out of your camping gear once home? Tenacious critters. May and June, the larger California Salmon flies came off. Now the Goldens and Lil yellow stones are about. In the Winter little brown/black stones. And, throughout the year all these nymphs are in and around the substrate of streams. For a beginner, keep any pattern tied simple. Mix the size and colors to match the type of stonefly, while retaining the simple pattern. (Brooks Stone: Kind of a mutt, I know, but it works).
A simple stonefly pattern tied in the round. A good, basic pattern. Weight it. No need for windcases, bead heads, rubber legs. Vary the sizes and colors. Impressionistic, easy to tie.