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Caddisfly Larva
Pollution-Intolerant
Some spin webs to trap food from the flowing water
One generation hatches per year
Although most species are very sensitive to pollution, some are pollution tolerant
Up to 1 1/2 inches long • Very small or no antennae
Six segmented legs on upper middle section of body
Filamentous gills may be on the end of the body or on the underside
