The little yellow stonefly, also called the yellow Sally, is a creature of fast flows and clean water. Before the hatch, stonefly nymphs crawl into the shallows and onto rocks along the bank. Above ...

In midsummer, a cute little yellow stonefly emerges on Montana rivers. Smaller than the giant salmonflies and the golden stones, the sally is very yellow in color with a reddish rear. The trout really ...