Photo of a spotted fishing spider perched on the water's surface amid floating duckweed plants

    Aquatic Spiders

    Dolomedes spp., Tetragnatha spp., and others
    image of greenbottle fly on carcass

    Blow Flies (Bottle Flies)

    About 84 species in North America.
    Gray, speckled, translucent gelatinous blob cut in half to show structure

    Bryozoans (Moss Animals)

    Freshwater species in the phylum Bryozoa
    Photo of two Chinese mystery snails, on a white background, with a ruler nearby for scale.

    Chinese Mystery Snail

    Cipangopaludina chinensis malleata (syn. Bellamya chinensis)
    invasive icon

    Invasive

    image of a Common True Katydid

    Common True Katydid

    Pterophylla camellifolia
    Photo of crane fly larva

    Crane Fly Larvae

    There are over 500 species of crane flies in North America.
    Photo of a spothanded crayfish viewed from above on white background.

    Crayfishes

    About 36 species in Missouri
    Image of a differential grasshopper.

    Differential Grasshopper

    Melanoplus differentialis
    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
    No photo available

    Hydras

    Various species in the genus Hydra
    Japanese beetle on a leaf

    Japanese Beetle

    Popillia japonica
    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 predaceous diving beetle

    Predaceous Diving Beetles (Water Tigers)

    Species in the beetle family Dytiscidae
    Photo of a ramshorn snail on a wet rock.

    Ramshorn Snails

    Gyraulus, Helisoma, Menetus, Micromenetus, Planorbula spp.
    Image of a red-legged grasshopper.

    Red-Legged Grasshopper

    Melanoplus femurrubrum
    Male eastern Hercules beetle walking in grass

    Scarab Beetles

    About 1,700 species in North America north of Mexico.
    photo of a male reddish-brown stag beetle

    Stag Beetles

    About 24 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.
    Photo of an adult stonefly on a leaf

    Stoneflies

    There are hundreds of species in North America
    Image of a sweat bee

    Sweat Bees

    Numerous species and genera in Missouri
    Photo of a pink planarian on a rock.

    Turbellarians (Planarians; Free-Living Flatworms)

    Species in genera Dugesia, Planaria, etc.
    Photo of a northern walkingstick on autumn dogwood leaves

    Walkingsticks (Stick Insects)

    Diapheromera femorata, Megaphasma denticrus, and others