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any insect of the order Plecoptera. North American species, of which there are more than 200, are yellowish, greenish, or brownish in the adult stage and have transparent wings, usually two pairs, but seldom fly. The eggs are deposited in the water; the abundant aquatic nymphs are found under stones, hence their name. Since the gills are poorly developed, the nymphs are confined to well-aerated waters, such as fast streams, where they form one of the most important food supplies for fresh-water fishes. One to three years may be required to reach the adult stage. Fishermen refer to adult stoneflies as browns and imitate their shape in lures. Stoneflies are classified in the phylum ArthropodaArthropoda
[Gr.,=jointed feet], largest and most diverse animal phylum. The arthropods include crustaceans, insects, centipedes, millipedes, spiders, scorpions, and the extinct trilobites.
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, class Insecta, order Plecoptera.
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Estimates of mayfly mortality: is stonefly predation a significant source?
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Invertebrates, like stonefly nymphs, take a little longer to digest.
It gives you intense Olive hatches, great caddis larva and stonefly nymphing, and the beginning of various caddis hatches along the lower corridor.
Stonefly (Plecoptera) food habits and prey preference in the Dolores River, Colorado.
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F) and Acroneuria lycorias (Newman) (Saether, 1977; Dosdall and Mason, 1981) and with the pteronarcyid stonefly Pteronarcys dorsata (Say) (Dosdall et al., 1986).
Consequence of larval intraspecific interference to stonefly growth and fecundity.
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You don't need to use large, heavily weighted stonefly nymphs to catch large trout consistently, though.
A similar response was observed by Fuller and Stewart (1977) for the predaceous stonefly Isoperla fulva, where early instars were phytophagous until they grew to a sufficient size for predation.