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Missouri Department of Conservation
MDC Discover Nature
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Gray
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1/4 to 1/2 inch
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Clear, rocky rivers, streams and springs
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White
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Lowland swamps, ditches and sloughs
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Tan
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Big rivers (Missouri and Mississippi)
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Gray
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Aquatic Pillbugs and Sowbugs (Aquatic Isopods)
Freshwater members of the crustacean order Isopoda
Freshwater Mussels
Bivalve molluscs in order Unionoida
Gilled Aquatic Snails (Prosobranch Pond Snails)
Over 20 Missouri species in former subclass Prosobranchia
Hydras
Various species in the genus Hydra
Mosquito Larvae
There are about 50 species of mosquitoes in our state.
Turbellarians (Planarians; Free-Living Flatworms)
Species in genera Dugesia, Planaria, etc.
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