Photograph of Sheepnose freshwater mussel shell exterior view

    Sheepnose (Bullhead)

    Plethobasus cyphyus
    exclamation mark

    Endangered

    Image of a silver-spotted skipper

    Silver-Spotted Skipper

    Epargyreus clarus
    Photo of a firebrat, a type of silverfish

    Silverfish (Firebrat)

    Lepisma saccharina, Thermobia domestica, and other species
    Photo of a silvery checkerspot, Wings Folded

    Silvery Checkerspot

    Chlosyne nycteis
    Photo of silvery-violet cort, a gray, gilled mushroom, dug up and lying on grass

    Silvery-Violet Cort

    Cortinarius alboviolaceus
    Image of a six-lined racerunner lizard

    Six-Lined Racerunner

    Aspidoscelis sexlineatus
    Photo of an unidentified grass skipper

    Skippers

    About 275 species in North America north of Mexico
    Photo of smooth chanterelles, vase-shaped yellow and white mushrooms

    Smooth Chanterelle

    Cantharellus lateritius
    fork and knife icon

    Edible

    Snuffbox

    Snuffbox

    Epioblasma triquetra
    exclamation mark

    Endangered

    Image of a southern cave fish

    Southern Cavefish

    Typhlichthys subterraneus
    Image of a speckled kingsnake

    Speckled Kingsnake

    Lampropeltis holbrooki
    Spectaclecase

    Spectaclecase

    Cumberlandia monodonta
    spike

    Spike (Ladyfinger)

    Elliptio dilatata
    Photo of female spiny-bellied orbweaver (spined micrathena) on a leaf

    Spined Micrathena

    Micrathena gracilis
    image of a Spittlebug and nest on plant stem

    Spittlebugs and Froghoppers

    About 60 species in North America north of Mexico
    Image of a spotted bass

    Spotted Bass

    Micropterus punctulatus
    Photo of a spotted fishing spider and several water springtails at the surface of shallow water

    Spotted Fishing Spider

    Dolomedes triton
    Elongate-bodied springtail on a brown leaf

    Springtails

    More than 8,000 species globally
    Photo of stalked scarlet cup cluster of red cup mushrooms with white stalks

    Stalked Scarlet Cup

    Sarcoscypha occidentalis
    illustration of a striped bass, side view

    Striped Bass

    Morone saxatilis
    No photo available

    Sturgeon Chub

    Macrhybopsis gelida
    Photo of a Summer Azure

    Summer Azure

    Celastrina neglecta
    Color illustration of Swamp Darter

    Swamp Darter

    Etheostoma fusiforme
    exclamation mark

    Endangered

    Color illustration of Taillight Shiner

    Taillight Shiner

    Notropis maculatus
    exclamation mark

    Endangered

    Photo of a tan jumping spider

    Tan Jumping Spider

    Platycriptus undatus
    image of a Tawny Emperor, Wings Spread

    Tawny Emperor

    Asterocampa clyton
    image of an Eastern Tent Caterpillar Moth

    Tent Caterpillar And Lappet Moths

    About 35 species in North America north of Mexico
    Photo of a Thiers amanita mushroom growing on a lawn.

    Thiers Amanita

    Amanita thiersii
    Photo of a thin-maze flat polypore, a bracket fungus, showing concentric rings

    Thin-Maze Flat Polypore

    Daedaleopsis confragosa (Daedalea confragosa)
    threehorn wartyback

    Threehorn Wartyback

    Obliquaria reflexa
    threeridge

    Threeridge

    Amblema plicata
    dogbane tiger moth

    Tiger and Lichen Moths

    Subfamily Arctiinae (formerly a family)
    image of Six-Spotted Tiger Beetle crawling on dead leaves

    Tiger Beetles

    Subfamily Cicindelinae (about 100 species in North America)
    Tortricid moth resting on a leaf

    Tortricid Moths

    About 1,400 species in North America north of Mexico
    Two-marked treehopper clinging to a stem

    Treehoppers

    More than 260 species in North America North of Mexico
    Photo of a pink planarian on a rock.

    Turbellarians (Planarians; Free-Living Flatworms)

    Species in genera Dugesia, Planaria, etc.
    Photo of big cluster of turkey tails, bracket fungus with concentric color rings

    Turkey Tail

    Trametes versicolor
    fork and knife icon

    Edible

    Tussock moth resting on a wooden board

    Tussock Moths

    About 30 species in subfamily Lymantriinae (formerly a family) in North America
    Photo of a magdalen underwing moth

    Underwing Moths

    Catocala spp., more than 100 species in North America north of Mexico
    Image of a red velvet ant

    Velvet Ants

    Numerous species in Missouri
    Photo of velvet foot mushrooms, mature, showing black stems.

    Velvet Foot

    Flammulina velutipes
    Photo of several violet toothed polypores, violet-gray bracket fungi

    Violet Toothed Polypore

    Trichaptum biforme
    Photo of three voluminous-latex milkies, tan mushrooms, of different sizes

    Voluminous-Latex Milky

    Lactarius volemus
    fork and knife icon

    Edible

    wabash pigtoe

    Wabash Pigtoe

    Fusconaia flava
    wartyback

    Wartyback

    Quadrula nodulata
    Photo of a single water strider

    Water Striders

    Aquarius remigis; also species in the genus Gerris
    Photo of a western slimy salamander

    Western Slimy Salamander

    Plethodon albagula
    Image of white crappie

    White Crappie

    Pomoxis annularis

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