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Photo of a marbled orbweaver spider

Angulate and Roundshouldered Orbweavers

Araneus spp.

image of Assassin Bug crawling on a leaf

Assassin Bugs

Nearly 200 species in North America north of Mexico

Venomous

Photo of a meloe blister beetle, female, on ground

Blister Beetles

More than 400 species in North America north of Mexico

image of greenbottle fly on carcass

Blow Flies (Bottle Flies)

About 84 species in North America.

Photo of a spothanded crayfish viewed from above on white background.

Crayfishes

About 36 species in Missouri

image of a boxelder bug

Eastern Boxelder Bug

Boisea trivittata

Monkey Face Mussel

Freshwater Mussels

Bivalve molluscs in order Unionoida

image of Fiery Searcher on dead leaves

Ground Beetles

About 2,400 species in North America north of Mexico

image of an Ichneumon Wasp on tree trunk

Ichneumon Wasps

More than 5,000 species in North America

Seven-spotted lady beetle on a flower

Lady Beetles (Ladybird Beetles; Ladybugs)

Nearly 500 species in North America north of Mexico

Swamp milkweed leaf beetle on a leaf it has chewed on.

Leaf Beetles

About 2,000 species in North America

image of a Leafhopper on leaf

Leafhoppers

More than 3,000 species in North America north of Mexico

Photo of a leech

Leeches

Various species in the subclass Hirudinea

Red milkweed beetle eating a common milkweed leaf.

Longhorned Beetles (Borers; Sawyer Beetles)

About 1,000 species in North America north of Mexico

Photo of a midge fly larva crawling on a rock in an aquarium

Midge Fly Larvae

Nearly 1,100 species in North America

image of Narceus Millipede crawling across gravel

Millipedes

More than 900 species in North America north of Mexico

image of Mosquito

Mosquitoes

There are about 50 species of mosquitoes in our state.

Photo of a ramshorn snail on a wet rock.

Ramshorn Snails

Gyraulus, Helisoma, Menetus, Micromenetus, Planorbula spp.

Male eastern Hercules beetle walking in grass

Scarab Beetles

About 1,700 species in North America north of Mexico.

image of a Spittlebug and nest on plant stem

Spittlebugs and Froghoppers

About 60 species in North America north of Mexico

Green stink bug on a leaf

Stink Bugs

In North America, more than 200 species in 64 genera.

Image of a sweat bee

Sweat Bees

Numerous species and genera in Missouri

Photo of a tan jumping spider

Tan Jumping Spider

Platycriptus undatus

Photo of an aquatic tubificid worm among rocks in an aquarium.

Tubificid Worms (Tubifex Worms)

Tubifex spp. and other aquatic tubificid annelids

image of Cocklebur Weevil

Weevils (Snout Beetles; Bark Beetles)

About 2,500 species in North America north of Mexico

image of a Wheel Bug, Side View

Wheel Bug

Arilus cristatus

Venomous