Pests to know in Wyoming
Pests documented in Wyoming
Many public records (179)
- Achemon Sphinx
- Aedes fitchii
- Agave Snout Weevil
- Alfalfa Looper
- American Black Bear
- American hornet moth
- American Mink
- American red squirrel (pine squirrel)
- Aspen Leaf Miner
- Aspen Twoleaf Tier
- Backswimmers
- Barn Funnel Weaver
- Bats (big brown bat and little brown bat)
- Beaver (American beaver)
- Bertha Armyworm
- Big Poplar Sphinx (Modest Sphinx)
- Bigeyed Bugs
- Bigheaded grasshopper
- Birch-Aspen Leafroller
- Black Flies
- Black-tailed prairie dog
- Blackjacket
- Blister Beetles
- Blue-black spider wasps
- Blue-legged grasshopper
- Bronzed Cutworm
- Brown Stink Bug
- Brown-spotted grasshopper
- Bruce Spanworm
- Bruner slant-faced grasshopper
- Bruner spur-throated grasshopper
- Buffalo Treehopper
- Cabbage Looper
- Canada thistle bud weevil
- Carolina Grasshopper
- Celery Looper
- Cellophane Bees
- Clear-winged grasshopper
- Cliff swallow
- Club-horned grasshopper
- Common Gluphisia
- Common Green Bottle Fly
- Cooley Spruce Gall Adelgid
- Cornfield Ant
- Coyote
- Crenulate-winged grasshopper
- Cudweed grasshopper
- Darkling Beetles (Stink Beetles)
- Dawson grasshopper
- Deer (white-tailed deer shown; mule deer similar)
- Deer Mouse
- Digger bees
- Dingy Cutworm
- Douglas-fir Beetle
- Drone Fly and Rat-Tailed Maggot
- Dusky grasshopper
- Ebony bugs
- Ebony grasshopper
- Field Ants
- Finned grasshopper
- Flabellate grasshopper
- Four-spotted grasshopper
- Gladston grasshopper
- Glassy Cutworm
- Golden buprestid
- Golden northern bumble bee
- Grasshoppers
- Green Fruitworms
- Ground Beetles
- Hayden grasshopper
- Hobo Spider
- Hollyhock Weevil
- Hop Looper
- Jerusalem Crickets
- Kiowa grasshopper
- Largeheaded grasshopper
- Lilac Root Weevil
- Lima Bean Pod Borer
- Linden Looper
- Little spur-throated grasshopper
- Marmots
- Masked Hunter
- Mason Bees
- Mayflies
- Meadow grasshopper
- Migratory grasshopper
- Miller Moth (Army Cutworm Moth)
- Mining Bees
- Mormon cricket
- Morrison's Pero
- Mottled sand grasshopper
- Mountain Lion
- Mountain Pine Beetle
- Muskrat
- Narrow-winged sand grasshopper
- Nine-spotted lady beetle
- Non-Biting Midges
- Northern grasshopper
- Obscure grasshopper
- Orange-legged grasshopper
- Packard grasshopper
- Painted Lady
- Pale western cutworm
- Parenthesis lady beetle
- Pasture grasshopper
- Pea Aphid
- Pine False Looper
- Pine Sawyers
- Pine White Butterfly
- Pocket gophers
- Poplar borer
- Poplar Carpenterworm
- Porcupine (North American porcupine)
- Predaceous diving beetles
- Punctured Tiger Beetle
- Red Fox
- Red turnip beetle
- Red-belted bumble bee
- Red-Legged Grasshopper
- Red-shanked grasshopper
- Red-winged grasshopper
- Redbacked Cutworm
- River otter (North American river otter)
- Rocky Mountain Wood Tick
- Russian thistle grasshopper
- Russian wheat aphid
- Sagebrush grasshopper
- Sandhill Crane
- Satin Moth
- Shrews (northern short-tailed shrew)
- Slant-faced pasture grasshopper
- Small Pine Looper
- Snakeweed grasshopper
- Speckle-winged grasshopper
- Spiny Elm Caterpillar (Mourning Cloak)
- Spotted Cutworm
- Spotted-winged grasshopper
- Spruce Beetle
- Spruce Coneworm
- Spruce Needleworm
- Spruce-Fir Looper (Pale-Marked Angle)
- Strawberry Crown Moth
- Strawberry Root Weevil
- Striped grasshopper
- Striped sand grasshopper
- Sweat Bees
- Ten-lined June Beetle
- Thatching Ants
- Thirteen-lined Ground Squirrel
- Thistle seedhead weevil
- Thistle Stem Gall Fly
- Thread-waisted sand wasps
- Three-banded grasshopper
- Toadflax stem weevils
- Two-striped mermiria
- Twospotted Lady Beetle
- Twospotted Stink Bug
- Twostriped Grasshopper
- Underwing Moths
- Vagabond gall aphid
- Variable Girdle Moth
- Velvet-striped grasshopper
- Voles (meadow mice)
- Water striders
- Wavy-lined Emerald
- Weasels (long-tailed weasel and relatives)
- Western balsam bark beetle
- Western bean cutworm
- Western black carpenter ant
- Western Conifer Looper
- Western harvester ant
- Western Spruce Budworm
- Western Tent Caterpillar
- Wheat Head Armyworm
- White-crossed grasshopper
- Whitetriangle Leafroller
- Whitewhiskered grasshopper
- Yellow-faced bees
- Yellowlined Forest Looper
Fewer public records (152)
- Aerial yellowjacket
- Alfalfa caterpillar (orange sulphur)
- Alfalfa plant bug
- American crow
- American Sand Wasp
- American yellowjacket
- Antlions
- Aphid Flies (Silver Flies)
- Argyrotaenia dorsalana
- Bald-faced Hornet
- Banded Garden Spider
- Bee Flies
- Beet Armyworm
- Beet Webworm
- Billbugs
- Bird cherry-oat aphid
- Black and Yellow Mud Dauber
- Black Carpet Beetle
- Black Witch
- Black-and-Yellow Lichen Moth
- Black-tailed bumble bee
- Bold Jumping Spider
- Boxelder Bug
- Brown-belted bumble bee
- Bumble Flower Beetle
- Burying beetles
- Cactus bug
- Canada Goose
- Carolina Wolf Spider
- Checkered White
- Cherry Scallop Shell Moth
- Clay-colored leaf beetle
- Click Beetles
- Clover leaf weevil
- Clover root curculio
- Cochineal Scale
- Common Carpet Beetle
- Common Pillbug
- Convergent Lady Beetle
- Corn Earworm (Tomato Fruitworm)
- Crab Spiders (e.g., goldenrod crab spider)
- Cuckoo wasps
- Currant Borer
- Currant Fruit Fly
- Damsel Bugs
- Darksided Cutworm
- Deer Fly
- Douglas-fir Tussock Moth
- Dragonflies
- Drain Fly (Moth Fly)
- Eastern Spruce Budworm
- Elm Leaf Beetle
- Elm Sawfly
- Elm Seed Bug
- Elm Spanworm
- European Paper Wasp
- European starling
- European Wool Carder Bee
- Field Crickets
- Firebrat
- Fruittree leafroller
- Ghost Ant
- Giant Conifer Aphids
- Giant Ichneumon Wasps
- Grass-Carrying Wasps
- Great Blue Heron
- Great Golden Digger Wasp
- Harvestmen (Daddy Longlegs)
- Hemlock Looper
- Horntails (Wood Wasps)
- House Fly
- House sparrow (English sparrow)
- Hover Flies (Flower Flies, Syrphid Flies)
- Hummingbird Moths
- Imported Cabbageworm
- Keeler grasshopper
- Knapweed flower weevils
- Lakin grasshopper
- Larder Beetle
- Large Yellow Underwing
- Larger raspberry aphid
- Leafcurl plum aphid
- Leafcutter Bees
- Lesser clover leaf weevil
- Long-horned bees
- Longlegged Flies
- Mealy plum aphid
- Metallic Pitch Blister Moth
- Nomad bees
- North American Racer
- Oil beetles
- Pale Beauty
- Pallid-winged grasshopper
- Pandora Moth
- Peachtree Borer
- Pennsylvania dingy ground beetle
- Pigeon (feral rock pigeon)
- Pigeon tremex
- Pine leaf adelgid
- Plains lubber grasshopper
- Pleasing Fungus Beetles
- Poplar and Willow Borer
- Rabbits (cottontails; eastern cottontail shown)
- Raccoon
- Rattlesnakes (western diamondback shown)
- Red Admiral
- Red Turpentine Beetle
- Red-headed leafy spurge stem borer
- Ring-billed Gull
- Robber Flies
- Rose gall wasps
- Rough Stink Bugs
- Rove Beetles
- Rusty Tussock Moth
- Say stink bug
- Scorpions
- Sevenspotted Lady Beetle
- Small Carpenter Bees
- Small Milkweed Bug
- Sod Webworms
- Southern plains bumble bee
- Spider Wasps
- Spittlebugs
- Spruce Bud Moth
- Spruce Needleminer
- Striped skunk
- Sumac flea beetle
- Sun Spiders (Windscorpions, Camel Spiders)
- Sunflower Receptacle Maggot
- Sunflower seed weevils
- Swallow Bug
- Tachinid Flies
- Treehoppers
- Two-spotted bumble bee
- Variegated Cutworm
- Variegated Fritillary
- Water boatmen
- Western Black Widow
- Western Conifer Seed Bug
- Western Grapeleaf Skeletonizer
- Western Pine Budworm
- Western Yellowjacket
- Western Yellowstriped Armyworm
- Whirligig beetles
- Whitelined Sphinx
- Wild turkey
- Woodpeckers
- Woodrats
- Yellow Mealworm
- Yellow-collared Scape Moth
- Zebra Caterpillar
- Zebra Jumping Spider
Range named by extension sources (3)
Termites in Wyoming
The native arid land subterranean termite lives in Wyoming's lower-elevation prairie, valleys, and sagebrush steppe.[2]
Invasive species reported here
Wyoming's first confirmed adult Japanese beetle was found in Kendrick Park in Sheridan on August 17, 2020.[3]
Pests local experts flag
Public agencies that handle pests
The Wyoming Department of Health's Infectious Disease Epidemiology Unit handles surveillance for infectious diseases, including West Nile virus.[6]
Hiring a licensed company
Wyoming's pesticide regulatory agency is the Wyoming Department of Agriculture (Pesticide Program).[1]
Free local help
University of Wyoming Extension offers insect identification; residents can start by emailing clear photos of the insect.[7]
Local guides in Wyoming
Through the year
Sources
- National Pesticide Information Center, “State Pesticide Regulatory Agencies.” npic.orst.edu/reg/state_agencies.html (accessed 2026-10-06)
- University of Wyoming Extension (Barnyards & Backyards), “Termites? In Wyoming?.” www.uwyo.edu/barnbackyard/_files/documents/magazine/2020/summer/0720termites.pdf (accessed 2026-10-06)
- Wyoming State Forestry Division (in UW Extension Barnyards & Backyards), “Residents asked to watch for Japanese beetles.” www.uwyo.edu/barnbackyard/_files/documents/magazine/2021/summer/0721japanesebeetles.pdf (accessed 2026-10-06)
- University of Wyoming Extension (Barnyards & Backyards), “Black Widow and Brown Recluse Spiders.” www.uwyo.edu/barnbackyard/_files/documents/magazine/2020/fall/0920spiders.pdf (accessed 2026-10-06)
- Wyoming Department of Health, “Colorado Tick Fever.” health.wyo.gov/publichealth/infectious-disease-epidemiology-unit/disease/colorado-tick-fever/ (accessed 2026-10-06)
- Wyoming Department of Health, “West Nile Virus.” health.wyo.gov/publichealth/infectious-disease-epidemiology-unit/disease/west-nile-virus/ (accessed 2026-10-06)
- University of Wyoming Extension, “Insect Identification.” www.uwyo.edu/entomology/insect-identification/index.html (accessed 2026-10-06)