Admirable Grasshopper on grass stem

    Admirable Grasshopper

    Syrbula admirabilis
    Photo of an alcohol inky mushroom cut in half lengthwise.

    Alcohol Inky

    Coprinopsis atramentaria (formerly Coprinus atramentarius)
    fork and knife icon

    Edible

    image of an Alderfly

    Alderflies

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

    Alderfly Larvae

    Sialis spp.
    Closeup of alligator gar held in a person's hands prior to being released into water

    Alligator Gar

    Atractosteus spatula (formerly Lepisosteus spatula)
    Image of alligator snapping turtle

    Alligator Snapping Turtle

    Macrochelys temminckii
    Photo of a blusher, a tan gilled mushroom, showing injured spot turning rust red

    Amanitas

    Amanita spp. (about 600 species, worldwide)
    Poisonous Icon

    Poisonous

    Jagged ambush bug on a plant stem

    Ambush Bugs

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

    Venomous

    Image of American Bullfrog

    American Bullfrog

    Lithobates catesbeianus (formerly Rana catesbeiana)
    Image of an american eel

    American Eel

    Anguilla rostrata
    Photo of an American lady butterfly, wings folded.

    American Lady

    Vanessa virginiensis
    American snout butterfly resting with wings folded

    American Snout

    Libytheana carinent
    image of Walker's Cicada clinging to a perch

    Annual Cicadas

    Neotibicen spp. (in Missouri) (formerly Tibicen)
    Photo of adult antlion with wings spread

    Antlion Adults

    More than 100 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
    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 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
    brokenray

    Arkansas Brokenray

    Lampsilis reeveiana
    Arkansas Darter Male

    Arkansas Darter

    Etheostoma cragini
    Photo of arrow-shaped micrathena spider

    Arrowshaped Micrathena

    Micrathena sagittata
    Photo of artist conk, woody bracket fungus on tree shown from side

    Artist Conk

    Ganoderma applanatum
    Photo of two ash tree boletes, tan pored mushrooms, one overturned showing pores

    Ash Tree Bolete

    Boletinellus merulioides
    fork and knife icon

    Edible

    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
    image of Bald-faced Hornet on Goldenrod

    Bald-Faced Hornet

    Dolichovespula maculata
    Baltimore checkerspot, perched, with wings folded

    Baltimore Checkerspot

    Euphydryas phaeton
    Image of a banded scuplin

    Banded Sculpin

    Cottus carolinae
    Photo of a beautiful wood-nymph
    image of Bee Fly on leaf

    Bee Flies

    About 800 species in North America
    Photo of beefsteak polypore, a rust-colored bracket fungus growing on tree base

    Beefsteak Polypore

    Fistulina hepatica
    fork and knife icon

    Edible

    Photo of a belted crayfish, also called Big River crayfish.

    Belted Crayfish (Big River Crayfish)

    Faxonius harrisonii (formerly Orconectes harrisonii)
    Photo of a Big Creek crayfish.

    Big Creek Crayfish

    Faxonius peruncus (formerly Orconectes peruncus)
    Photo of two gigantic red false morels, cut and laying on a ground

    Big Red False Morel

    Gyromitra caroliniana
    Poisonous Icon

    Poisonous

    image of a Toad Bug

    Big-Eyed Toad Bug

    Gelastocoris oculatus
    Image of a bigmouth buffalo

    Bigmouth Buffalo

    Ictiobus cyprinellus
    Photo of broken bolete mushroom cap, being held to show pores

    Bitter Bolete

    Tylopilus felleus
    Image of a black bullhead

    Black Bullhead

    Ameiurus melas
    A long fish with prominent dorsal and pectoral fins

    Black Carp

    Mylopharyngodon piceus
    invasive icon

    Invasive

    Illustration of a male black crappie in spawning coloration.

    Black Crappie

    Pomoxis nigromaculatus
    Photograph of a black morel mushroom

    Black Morel

    Morchella angusticeps (formerly M. elata)
    fork and knife icon

    Edible

    Photo of two black trumpets, dark brown vase-shaped mushrooms on mossy ground

    Black Trumpet

    Craterellus cornucopioides (C. fallax)
    fork and knife icon

    Edible

    Photo of black-footed polypore, mature specimens, with photographer's foot.

    Black-Footed Polypore

    Polyporus badius
    Photo of black-staining polypore, a mushroom with tan, wavy, fan-shaped caps

    Black-Staining Polypore

    Meripilus sumstinei (formerly M. giganteus)
    fork and knife icon

    Edible

    Image of a blackspotted topminnow

    Blackspotted Topminnow

    Fundulus olivaceus
    Image of a blackstripe topminnow

    Blackstripe Topminnow

    Fundulus notatus
    Image of a blanding's turtle

    Blanding’s Turtle

    Emydoidea blandingii
    exclamation mark

    Endangered

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