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Stonefly
Pollution-Intolerant
About 500 species in North America
Are found in cool, clean streams with high levels of dissolved oxygen
Develop in the stream for period of three months to three years • Are either predators or feed on fungi and bacteria from rotting leaves
Two long antennae
Two hair-like tails
Gills often located on or behind each leg
Six segmented legs on middle section of body
Each leg has two hooks on the end
