Jagged ambush bug on a plant stem

    Ambush Bugs

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

    Venomous

    Acrobat ants on a leaf

    Ants

    More than 700 species in North America
    several yellow aphids on plant

    Aphids

    More than 1,300 species in North America north of Mexico
    Photo of a female arabesque orbweaver spider

    Arabesque Orbweaver

    Neoscona arabesca
    Two Asian lady beetles, one orange with several black spots, the other red with no spots

    Asian Lady Beetle

    Harmonia axyridis
    image of Assassin Bug crawling on a leaf

    Assassin Bugs

    Nearly 200 species in North America north of Mexico
    Venomous Icon

    Venomous

    Photo of backswimmer, side view

    Backswimmers

    About 32 North American species in the family Notonectidae
    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 a cellar spider in her cobweb with egg sac

    Cellar Spiders

    Pholcus, Psilochorus, and others in the Pholcid family
    magnified chigger

    Chiggers

    Trombicula alfreddugesi and other Trombicula spp. (syn. Eutrombicula)
    Wood cockroach crawling on tree

    Cockroaches and Termites

    About 100 species of cockroaches and termites in North America north of Mexico
    Photo of a common house spider, egg sac, and web

    Common House Spider

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

    Daddy Longlegs (Harvestmen)

    About 6,500 species have been named so far, worldwide.
    Dogwood spittlebug resting on the edge of a leaf

    Dogwood Spittlebug

    Clastoptera proteus
    Photo of a featherlegged orbweaver and egg case on a leaf

    Featherlegged Orbweaver

    Uloborus glomosus
    filmy dome spider

    Filmy Dome Spider

    Neriene radiata (formerly Prolinyphia marginata)
    Photo of a green crab spider on a leaf

    Foliage Flower Spiders

    Mecaphesa spp. and Misumessus 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
    Golden tortoise beetle on a leaf

    Golden Tortoise Beetle

    Charidotella sexpunctata
    Photo of a goldenrod crab spider, whitish individual, on native aster flower

    Goldenrod Crab Spider

    Misumena vatia
    Photo of a green crab spider on a leaf

    Green Crab Spider

    Misumessus oblongus (formerly Misumenops oblonga)
    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.
    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
    Swamp milkweed leaf beetle on a leaf it has chewed on.

    Leaf Beetles

    About 2,000 species in North America
    photo of a leafcutter bee

    Leafcutter Bees

    Megachile spp.
    image of a Leafhopper on leaf

    Leafhoppers

    More than 3,000 species in North America north of Mexico
    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 pulmonate snail crawling on rock

    Lunged Aquatic Snails (Pulmonate Pond Snails)

    Over 30 Missouri species in former subclass Pulmonata
    Marbled orbweaver spider in web

    Marbled Orbweaver

    Araneus marmoreus
    Narceus Millipede crawling across gravel

    Millipedes

    More than 900 species in North America north of Mexico
    Photo of a northern crab spider

    Northern Crab Spider

    Mecaphesa asperata
    Photo of a female openfield orbweaver spider crouching on a plant stalk

    Openfield Orbweaver

    Araneus pratensis
    Photo of an orchard orbweaver with a black background

    Orchard Orbweaver

    Leucauge venusta
    Acanaloniid planthopper, green, viewed from side

    Planthoppers

    More than 900 species in North America north of Mexico
    Image of a deceased pseudoscorpion on a US dime

    Pseudoscorpions

    Various species in the order Pseudoscorpionida
    Photo of a ramshorn snail on a wet rock.

    Ramshorn Snails

    Gyraulus, Helisoma, Menetus, Micromenetus, Planorbula spp.
    Red-headed ash borer on tree bark

    Red-Headed Ash Borer

    Neoclytus acuminatus
    Male eastern Hercules beetle walking in grass

    Scarab Beetles

    About 1,700 species in North America north of Mexico
    Photo of amphipod on a rock

    Scuds and Sideswimmers (Amphipods)

    Species in the crustacean order Amphipoda
    Photo of a firebrat, a type of silverfish

    Silverfish (Firebrat)

    Lepisma saccharina, Thermobia domestica, and other species
    A reddish centipede crawls over a rock

    Soil Centipedes

    Estimated 4,000 species globally
    image of Soldier Beetle on Goldenrod

    Soldier Beetles

    Nearly 500 species in North America north of Mexico

Pages