California Department of Fish and Wildlife
Aquatic Biological Assement

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Ephemeroptera Odonata Plecoptera Hemiptera Megaloptera Neuroptera Trichoptera Lepidoptera Coleoptera Diptera Non-Insects




Key Characters Thousands of species, 12 freshwater species in U.S. 10 -7- cm in length. Body same diameter throughout its length. Threadlike, only slightly tapered on both ends.
Tolerance 10
Distribution CA, OR, WA, NV, AZ, Baja