General Pollution Tolerance Sensitive Moderately Sensitive Intermediate Moderately Tolerant Tolerant

Dobsonflies & Alderflies Order Megaloptera General Characteristics: Wing pads absent Abdomen has well defined lateral filaments Abdomen ends with long filament or a pair of prolegs each with 2 hooks. Dobson Fly ( Family Corydalidae) Alder Fly (Family Sialidae)

Mayflies General Characteristics: Order Ephemeroptera Filamentous antennae 1 tarsal claw Presence of lateral or ventrolateral gills on most of segments 1-7 Majority have 3 caudal filaments Wingpads are present

Mayflies Order Ephemeroptera Family Baetidae Family Ephemeridae Family Ephemerellidae Family Heptageniidae Family Baetidae Family Ephemeridae Family Leptophlebiidae Family Caenidae Family Isonychiidae Family Tricorythidae

Caddisflies General Characteristics: Order Trichoptera 3 pair of thoracic legs near head Single tarsal claw Abdominal gills Head subdivided into 3 parts by Y-shaped lines Short anal prolegs without joints at end of abdomen, with pointed claws No wing pads

Caddisflies Order Trichoptera Family Leptoceridae Family Hydroptilidae Family Helicopsychidae Family Hydroptilidae Family Hydropsychidae Family Polycentropodidae

Dragonflies & Damselflies Order Odonata General Characteristics: Easily distinguished from all other aquatic insects Large body size Elongated hinged lower lip (labium) modified for seizing prey Wing pads present Suborder: Anisoptera Dragonflies Suborder: Zygoptera Damselflies

Dragonflies General Characteristics: Suborder Anisoptera Abdomen relatively broad and terminates in three triangular shaped cerci Some move by rapidly expelling water through rectal chamber Most are burrowers or clingers Labium forms spoon-shaped mask fitting over the lower part of head and mouth parts; others have a flat labium

Dragonflies Suborder Anisoptera Family Libelluidae Family Aeshnidae Family Corduliidae Family Gomphidae

Damselflies General Characteristics: Suborder Zygoptera Abdomen long and thin ending in 3 long vertically oriented gills (caudal lamellae) Swim by moving abdomen from side to side Most cling to plants and other objects Labium longer and narrower than the dragonfly’s

Family Calopterygidae Damselflies Suborder Zygoptera Family Coengrionidae Family Calopterygidae

Stoneflies General Characteristics: Order Plecoptera Long Antennae 2 claws on each tarsus Gills, if present, on head, thorax, or basal segments of abdomen 2 long caudal filaments or cerci Wing pads

Deerflies or Horseflies True Flies Order Diptera Deerflies or Horseflies Black Flies Family Tabanidae Midges Family Simulidae Family Chironomidae Crane Flies Red-Tail Maggots Family Tipulidae Family Syrphidae Mosquitoes Family Culicidae

Family Belostomatidae True Bugs Giant Waterbugs Order Hemiptera Back Swimmers Water Boatmen Family Belostomatidae Family Notonectidae Family Corixidae Water Scorpions Creeping Waterbugs Family Nepidae Broad Shouldered Water Striders Family Naucoridae Water Striders Family Gerridae Family Veliidae

Beetles Order Coleoptera Family Psephenidae Family Dytiscidae Water Pennies Family Psephenidae Predaceous Diving Beetles Family Dytiscidae Water Scavenger Beetles Family Hydrophilidae Whirligig Beetles Family Gyrinidae Riffle Beetles Family Elmidae

Aquatic Caterpillars Unsegmented Worms Order Lepidoptera Family Pyralidae Unsegmented Worms Phylum Platyhelminthes Class Turbellaria

Segmented Worms Phylum Annelida Class Hirudinae Class Oligochaeta Leeches Class Hirudinae Bristle Worms Class Oligochaeta

Crustaceans Class Crustacea Order Isopoda Order Decapoda Southeastern river Shrimp, Southern Prawns, and Grass Shrimp Families: Macrobrachium Palaemonetes Crayfish Family Cambaridae Order Isopoda Sowbugs Family Asellidae

Microscopic Crustaceans Class Crustacea Order Amphipoda Sideswimmers or Scuds Families: Gammaridae Hyalellidae Order Copepoda Order Cladocera Free-Living Copepods Microscopic Crustaceans Daphnia

Molluscs Water Mites Phylum Mollusca Class Pelecypoda Class Gastropoda Clams Class Pelecypoda Snails and Limpets Class Gastropoda Water Mites Class Arachnida Order Acarina Suborder Hydracarina