image of an Alderfly

    Alderflies

    Sialis spp.
    Photo of an alderfly larva among rocks and gravel in an aquarium.

    Alderfly Larvae

    Sialis spp.
    Jagged ambush bug on a plant stem

    Ambush Bugs

    Phymata spp. and others in subfamily Phymatinae (ambush bugs)
    Venomous Icon

    Venomous

    Andrenid or miner bee collecting pollen on a flower

    Andrenid Bees (Miner Bees)

    More than 1,200 species in North America north of Mexico
    image of Antlion Larva on rock

    Antlion Larvae (Doodlebug Larvae)

    More than 100 species in North America north of Mexico
    Longhorn bee visiting a flower, viewed from side

    Apid Bees

    About 1,000 species in North America north of Mexico
    Photo of an aquatic isopod in an aquarium, crawling on a rock.

    Aquatic Pillbugs and Sowbugs (Aquatic Isopods)

    Freshwater members of the crustacean order Isopoda
    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 Assassin Bug crawling on a leaf

    Assassin Bugs

    Nearly 200 species in North America north of Mexico
    Venomous Icon

    Venomous

    Photo of a spotted orbweaver or barn spider, Neoscona crucifera, with black background

    Barn Spider

    Neoscona crucifera
    image of Bee Fly on leaf

    Bee Flies

    About 800 species in North America
    image of a Toad Bug

    Big-Eyed Toad Bug

    Gelastocoris oculatus
    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.
    Closeup of brown recluse spider on floor.

    Brown Recluse (Violin Spider)

    Loxosceles reclusa
    Venomous Icon

    Venomous

    Gray, speckled, translucent gelatinous blob cut in half to show structure

    Bryozoans (Moss Animals)

    Freshwater species in the phylum Bryozoa
    image of Caddisfly on leaf

    Caddisflies

    About 1,500 species in North America north of Mexico
    Photo of caddisfly larva with case made of detritus

    Caddisfly Larvae

    Various species in the order Trichoptera
    image of a Carolina Grasshopper

    Carolina Grasshopper

    Dissosteira carolina
    Photo of a cellar spider in her cobweb with egg sac

    Cellar Spiders

    Pholcus, Psilochorus, and others in the Pholcid family
    Chinese mantis

    Chinese Mantis

    Tenodera sinensis (formerly T. aridifolia)
    Citrus flatid planthopper on twig

    Citrus Flatid Planthopper

    Metcalfa pruinosa
    Click beetle resting on a brick wall

    Click Beetles

    Approximately 1,000 species in North America
    Photo of a common house spider, egg sac, and web

    Common House Spider

    Parasteatoda tepidariorum (syn. Achaeranea tepidariorum)
    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
    Photo of a Harvestman, viewed from above

    Daddy Longlegs (Harvestmen)

    About 6,500 species have been named so far, worldwide.
    Photo of a damselfly nymph on rocks in an aquarium.

    Damselfly Larvae

    Species in the suborder Zygoptera
    Photo of a dull colored spittlebug adult on a twig

    Diamondback Spittlebug

    Lepyronia quadrangularis
    Photo of a dragonfly larva resting on a stone.

    Dragonfly Larvae

    Species in the suborder Anisoptera
    image of a boxelder bug

    Eastern Boxelder Bug

    Boisea trivittata
    Elm borer beetle resting on rocks in a flower planter

    Elm Borer

    Saperda tridentata
    Photo of an adult female field cricket

    Field Crickets

    Gryllus spp., Acheta domesticus, and other in subfamily Gryllinae
    Flat-faced longhorn beetle crawling on wood

    Four-Humped Flat-Faced Longhorn

    Acanthoderes quadrigibba
    Photo of a freshwater jellyfish

    Freshwater Jellyfish

    Craspedacusta sowerbii (syn. C. sowerbyi)
    Monkey Face Mussel

    Freshwater Mussels

    Bivalve molluscs in order Unionoida
    Photo of a furrow orbweaver hanging head down with a green background

    Furrow Orbweavers

    Larinioides spp.
    Photo of several prosobranch pond snails crawling on a rock.

    Gilled Aquatic Snails (Prosobranch Pond Snails)

    Over 20 Missouri species in former subclass Prosobranchia
    image of Fiery Searcher on dead leaves

    Ground Beetles

    About 2,400 species in North America north of Mexico
    Photo of a Xysticus crab spider, tan individual

    Ground Crab Spiders

    Xysticus spp.
    A metallic green sweat bee gathering pollen on a yellow flowerhead

    Halictid Bees (Sweat Bees)

    More than 500 species in North America north of Mexico
    Photo of female heptagonal orbweaver in web.
    Image of house centipede

    House Centipede

    Scutigera coleoptrata
    No photo available

    Hydras

    Various species in the genus Hydra
    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

    Land Snails and Slugs

    Approx. 150 species of land snails and slugs in Missouri
    Large crane fly perched on a white-painted surface, side view

    Large Crane Flies

    More than 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

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