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

    Alderfly Larvae

    Sialis spp.
    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

    American eel side view photo with black background

    American Eel

    Anguilla rostrata
    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 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, female, side view photo with black background

    Arkansas Darter

    Etheostoma cragini
    Photo of arrow-shaped micrathena spider

    Arrowshaped Micrathena

    Micrathena sagittata
    Photo of two ash tree boletes, tan pored mushrooms, one overturned showing pores

    Ash Tree Bolete

    Boletinellus merulioides
    fork and knife icon

    Edible

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

    Asian Lady Beetle

    Harmonia axyridis
    Asian longhorned beetle male, specimen

    Asian Longhorned Beetle

    Anoplophora glabripennis
    invasive icon

    Invasive

    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
    Baltimore checkerspot, perched, with wings folded

    Baltimore Checkerspot

    Euphydryas phaeton
    banded or white backed garden spider in web

    Banded Garden Spider

    Argiope trifasciata
    Banded sculpin side view photo with black background

    Banded Sculpin

    Cottus carolinae
    Photo of a Banded Tiger Moth

    Banded Tiger Moth

    Apantesis vittata
    Photo of bearded tooth, white round beardlike mushroom growing from tree trunk

    Bearded Tooth

    Hericium erinaceus
    fork and knife icon

    Edible

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

    Bee Flies

    About 800 species in North America
    Photo of Berkeley's polypore, fresh, young specimen.

    Berkeley’s Polypore

    Bondarzewia berkeleyi
    fork and knife icon

    Edible

    No photo available

    Big Laughing Gym (Big Laughing Jim)

    Gymnopilus junonius (formerly G. spectabilis)
    Poisonous Icon

    Poisonous

    Black bullhead side view photo with black background

    Black Bullhead

    Ameiurus melas
    Photo of a Black-and-Yellow Lichen Moth
    Image of a Black-Bordered Lemon Moth

    Black-Bordered Lemon Moth

    Marimatha nigrofimbria
    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 blanding's turtle

    Blanding’s Turtle

    Emydoidea blandingii
    exclamation mark

    Endangered

    Photo of a meloe blister beetle, female, on ground

    Blister Beetles

    More than 400 species in North America north of Mexico
    Bluegill male in spawning colors, side view photo with black background

    Bluegill

    Lepomis macrochirus
    Image of a broad-banded watersnake

    Broad-Banded Watersnake

    Nerodia fasciata confluens
    Brook silverside side view photo with black background

    Brook Silverside

    Labidesthes sicculus
    Closeup of brown recluse spider on floor.

    Brown Recluse (Violin Spider)

    Loxosceles reclusa
    Venomous Icon

    Venomous

    Brown trout female side view photo with black background

    Brown Trout

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

    Bryozoans (Moss Animals)

    Freshwater species in the phylum Bryozoa
    Image of a bullsnake

    Bullsnake

    Pituophis catenifer sayi
    photo of bumblebee on a wild rose flower

    Bumble Bees

    Bombus spp.
    Several regal fritillaries feeding on butterfly weed

    Butterflies and Skippers

    More than 700 species in North America north of Mexico
    butterfly

    Butterfly

    Ellipsaria lineolata
    Photo of a Cabbage White

    Cabbage White

    Pieris rapae
    image of Caddisfly on leaf

    Caddisflies

    Various species in the order Trichoptera
    Photo of caddisfly larva with case made of detritus

    Caddisfly Larvae

    Various species in the order Trichoptera
    Image of Tomentose Burying Beetle crawling on the ground

    Carrion Beetles (Burying Beetles)

    Nicrophorus, Necrophila, Necrodes, and other Silphid genera
    Image of a cave salamander

    Cave Salamander

    Eurycea lucifuga
    Photo of a cellar spider in her cobweb with egg sac

    Cellar Spiders

    Pholcus, Psilochorus, and others in the Pholcid family

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