Alphabetical List of Critters
(A) (B) (C) (D) (E) (F) (G) (H) (I) (J) (K) (L) (M) (N) (O) (P) (R) (S) (T) (V) (W) (Y)
- Acrobat Ant
- Allegheny Mound Ant
- Ambush Bugs
- American Carrion Beetle
- American Cockroach
- American Dagger Caterpillar (see Caterpillars)
- American Dog Tick
- American Lady / American Painted Lady (very similar to a Painted Lady) (BugGuide.net)
- American Serpentine Leafminer (University of Florida)
- Annual Cicada
- Ants
- Aphids
- Apple Maggot
- Armyworms
- Ash Bark Beetles
- Asian Longhorned Beetle (invasive) (no confirmed sightings in Maine as yet)
- Asiatic Garden Beetle
- Asparagus Beetles (Common and Spotted)
- Assassin Bugs
- Aster Leafhopper
- Azalea Lace Bug
- Azalea Leafminer
- Backswimmers (UWM)
- Bald-faced Hornets
- Banded Tussock Caterpillar
- Banded Woollybear (BugGuide.net)
- Bark Beetles
- Barklice (and Booklice)
- Bean Leaf Beetle
- Bed Bugs
- Bedstraw Sphinx (Galium Sphinx) Caterpillar
- Bees — some online resources available include: “Understanding Native Bees, the Great Pollinators: Enhancing Their Habitat in Maine” and “How to Create a Bee-Friendly Landscape“ (UMaine Extension); see also the comprehensive website “Bee Health“ by eXtension!
- Beetle Grubs
- Bella Moth / Beautiful Utetheisa
- Bird Mites (UMN Extension)
- Bird Tick
- Black-legged Tick/Deer Tick
- Black and Yellow Garden Spider (Penn State) – see also Ohio DNR
- Black Blister Beetle
- Black Carpet Beetle
- Black Swallowtail / Eastern Black Swallowtail (University of Florida) | Caterpillar (photo) and Butterfly (photo)
- Black Flies
- Black Vine Weevil
- Blister Beetles
- Blow Flies and Flesh Flies
- Blueberry Insect Pests (specific to Maine low-bush blueberry):
- Blueberry Flea Beetle
- Blueberry Maggot
- Blueberry Spanworm
- Blueberry Thrips
- Red-striped Fireworm
- Spotted-wing Drosophila (see Fruit Flies)
- Booklice (and Barklice)
- Boxelder Bugs (BugGuide.net) See also: Boxelder Bugs (Univ. of Minnesota Extension)
- Broadhorned Flour Beetle
- Broad-nosed Weevils (BugGuide.net)
- Broad Mites (Tennessee State Univ.)
- Bronze Carabid / Bronze Ground Beetle
- Brown-banded Cockroach
- Brown-hooded Owlet Caterpillar
- Browntail Moth/Caterpillar
- Brown Dog Tick
- Brown Marmorated Stink Bug
- Bumblebees (BugGuide.net) — see also How to Create a Bee-Friendly Landscape
- Butterflies and Moths
- Butterflies (The Butterflies and Moths of North America project)
- Cabbage Looper
- Cabbage Maggot
- Cabbageworm/Imported Cabbageworm
- Caddisflies (the larvae are aquatic) (BugGuide.net)
- Camel Crickets
- Candy-striped Leafhopper
- Carpenter Ants
- Carpet Beetles
- Carrion Beetles
- Caterpillars
- Cecropia Moth
- Cellar Spiders
- Centipedes
- Charadra deridens caterpillar
- Chinch Bugs
- Cicadas
- Clavate Tortoise Beetle
- Clay-colored Weevil
- Click Beetles
- Clothes Moths
- Clouded Sulphur butterfly (BugGuide.net)
- Clover Mites (Penn State)
- Cluster Flies
- Cockroaches
- Codling Moth
- Colorado Potato Beetle
- Common Asparagus Beetle
- Common Ringlet (BugGuide.net)
- Common Stalk Borer
- Confused Flour Beetle
- Corn Earworm
- Corn Rootworm (Northern, Western & Southern)
- Cornfield Ant
- Cranberry Insect Pests:
- Blackheaded Fireworm
- Cranberry Fruitworm (cranberry and highbush blueberry pest)
- Cranberry Weevil
- Cranberry Tipworm
- False Armyworm
- Redheaded Flea Beetle
- Crane Flies
- Crazy Ant
- Crickets
- Cucumber Beetle (Striped Cucumber Beetle)
- Curve-toothed Geometer (BugGuide.net)
- Cutworms
- Cyclamen Mites (Univ. of Kentucky)
- Damselflies
- Deer Flies
- Deer Tick
- Diamondback Moth
- Diamondback Soil Centipede
- Dobsonflies
- Dogwood Sawfly (Iowa State Univ. Extension) (additional images, including the adult stage: BugGuide.net)
- Dog Tick
- Dragonflies
- Drain Flies (also called Moth Flies)
- Drone Fly/Dronefly
- Drugstore Beetles (Univ. of Florida) | See also Drugstore Beetle (BugGuide.net) and Drugstore Beetles (Univ. of Wisconsin)
- Dust Mites
- Earwigs
- Eastern Ash Bark Beetle
- Eastern Black Swallowtail (University of Florida) | Caterpillar (photo) and Butterfly (photo)
- Eastern Boxelder Bugs (BugGuide.net) See also: Boxelder Bugs (Univ. of Minnesota Extension)
- Eastern Cicada-killer Wasp (Missouri Dept. of Conservation) See also: Sphecius speciosus (BugGuide.net)
- Eastern Hemlock Looper
- Eastern Parson Spider
- Eastern Subterranean Termites (PDF) (Cornell University) — Rare in Maine; mostly occur only in pocket areas in some southern and coastal locations.
- Eastern Tent Caterpillars
- Elm Sawfly
- Emerald Ash Borer (invasive)
- Euonymus Caterpillars
- European Apple Sawfly
- European Chafer
- European Corn Borer
- European Crane Fly (invasive)
- European Ground Beetle
- European Hornet
- European Pine Sawfly
- European Red Ant / European Fire Ant (invasive)
- European Red Mite
- Eyed Click Beetle (Eyed Elater)
- Fall Armyworm
- Fall Webworm
- False Black Widow Spider (Penn State)
- False Honey Ant
- Field Crickets
- Filmy Dome Spider
- Firebrats (and Silverfish)
- Fishflies
- Fishing Spiders
- Flat Bark Beetle (Penn State / New Kensington) (Maine specimen/photo)
- Flea Beetles
- Fleas
- Flesh Flies and Blow Flies
- Flour Beetles
- Flour / Grain Mites (University of Kentucky)
- Flour Moth
- Flower Flies (also called Hover Flies or Syrphid Flies)
- Forest Pests (Maine Forest Service)
- Forest Tent Caterpillars
- Four-lined Silverfish
- Foxglove Aphids
- Fruit Flies
- Fuller Rose Beetle (weevil) (Univ. of Florida)
- Fungus Gnats
- Fungus Moths
- Galium Sphinx Moth (BugGuide.net)
- Galium Sphinx caterpillar (photo courtesy of Ellen Lamb)
- Galium Sphinx caterpillar (staff photo)
- Galium Sphinx pupa (staff photo)
- Garden Spider (Penn State) see also Ohio DNR
- Garden Tiger Moth (Butterflies and Moths of North America Project)
- German Cockroach
- Giant Water Bug
- Golden Ground Beetle (metallic green but with gold reflections) (BugGuide.net)
- Golden Paper Wasps (BugGuide.net)
- Grain Beetles
- Grain / Flour Mites (University of Kentucky)
- Great Golden Digger Wasp (University of Wisconsin)
- Great Tiger Moth (Butterflies and Moths of North America Project)
- Green Peach Aphids
- Ground Beetles (some examples):
- Bronze Carabid / Bronze Ground Beetle
- Golden Ground Beetle (metallic green but with gold reflections) (BugGuide.net)
- Ground and Tiger Beetles (Penn State)
- Groundhog (Woodchuck) Tick
- Ground-nesting Solitary Bees (Cornell)
- Grubs (White Grubs)
- G**** Moth — find it now by its new name of Spongy Moth
- Half-Wing (geometer moth)
- Half-Wing moth (staff photo)
- Half-Wing (BugGuide.net)
- Head Lice
- Hemlock Looper
- Hemlock Woolly Adelgid (invasive)
- Hickory Tussock Caterpillar
- Honey bees (eXtension.org)
- Hornets/Wasps/Yellowjackets
- Horntails
- Hornworms
- Horse Flies
- Horsehair Worm
- House Centipede
- House Crickets (most often in basements)
- House Dust Mites
- House Flies
- Hover Flies (also called Flower Flies or Syrphid Flies)
- Hummingbird Clearwing Moth (BugGuide.net)
- Ichneumonid wasps (Texas A&M)
- Imported Cabbageworm
- Inchworms (Loopers/Geometers) (USGS) | See also Caterpillars of Eastern Forests (PDF) (pp 69-85) (US Forest Service)
- Indian Meal Moth
- Introduced Pine Sawfly
- Japanese Beetles — includes a video: How to Get Rid of Japanese Beetles
- Jumping Spiders (University of Arizona)
- Jumping Worms
- Jumping/Snake (Amynthas) Worms in Maine (Maine Dept of ACF)
- If you believe you’ve found a Jumping Worm in Maine: Jumping Worm(s) Report Form (Maine Dept of ACF)
- June Beetles
- Katydids (also known as long-horned grasshoppers)
- Kennel Tick
- Lace Bugs
- Lacewings (Virginia Tech)
- Ladybugs / Ladybird Beetles (Multicolored Asian Lady Beetle)
- Larder Beetles
- Large Yellow Underwing (Oregon State Univ)
- Larger Yellow Ants
- Laugher caterpillar
- Leafhoppers – see also:
- Aster Leafhopper
- Candy-striped Leafhopper
- Potato Leafhopper (part of UMaine Extension’s Potato IPM Program)
- Leafminers
- Birch Leafminers (University of Minnesota)
- Leafminers in Home Gardens (University of Minnesota)
- Leafminers of Vegetable Crops (Utah State University)
- Serpentine (American Serpentine) Leafminer (University of Florida)
- Vegetable Leafminer (University of Florida)
- Leatherjackets (Crane fly larvae)
- Leek Moth (invasive) (Cornell)
- Leopard Slugs
- Lesser Grain Borers
- Lesser Mealworms
- Lice / Booklice
- Lice / Head Lice
- Lily Leaf Beetle
- Little Black Ant
- Locust Borer
- Lone Star Tick
- Longhorned Beetles (and Roundheaded Borers) (Iowa State Univ.) — see also listing for Asian Longhorned Beetle
- Loopers (USGS) | See also Caterpillars of Eastern Forests (PDF) (pp 69-85) (US Forest Service)
- Lovebugs (Family Bibionidae) (BugGuide.net)
- Luna Moth (and caterpillar)
- Lymantria dispar (Spongy Moth)
- March Flies (BugGuide.net)
- Margined Carrion Beetle
- Masked Hunter
- May/June Beetles
- Mayflies (Michigan State Univ. Extension)
- Meal Moth (BugGuide.net)
- Mealworms
- Mealybugs (PDF) (on house plants) (Cornell)
- Merchant Grain Beetle
- Metallic Wood-Boring Beetle (Univ. of Minnesota Extension)
- Mexican Bean Beetle
- Milkweed Tussock Caterpillar (The Butterflies and Moths of North America project)
- Millipedes
- Mites
- Bird Mites [will bite people in the absence of their bird host(s)] (University of Minnesota Extension)
- Clover Mites (Penn State)
- Dust Mites
- Mold Mites / Tyroglyphid Mites (Iowa State University)
- Grain / Flour Mites (University of Kentucky)
- Spider Mites
- Parasitic Mites of Humans (University of Kentucky)
- Monarch Butterfly and Caterpillar
- Moose Tick
- Mosquitoes (Maine Forest Service) see also:
- Mosquito Biology (UMaine Extension)
- Mosquito Management (UMaine Extension)
- Insect Repellents (UMaine Extension)
- West Nile Virus (CDC)
- Preventing Eastern Equine Encephalitis (EEE) Virus in Maine
- Moth Flies (also called Drain Flies)
- Moths (and Butterflies)
- Mourning Cloak Butterfly (The Butterflies and Moths of North America project)
- Mouse Tick
- Mullein Plant Bug (Cornell)
- Multicolored Asian Lady Beetle
- Northeastern Pine Sawyer Beetle
- Northern Corn Rootworm (includes Western & Southern also) (Univ. of Illinois)
- Northern Pearly-eye Butterfly (BugGuide.net)
- Nursery Web Spider
- Oblique-banded Leafroller (Cornell)
- Odorous House Ant (Univ. of Minnesota Extension)
- Oil Beetles
- One-eyed Sphinx Moth (BugGuide.net)
- Onion Maggots
- Onion Thrips (Cornell)
- Oriental Beetle (NC State Extension)
- Painted Lady (Butterflies and Moths of North America Project)
- Pantry pests:
- Paper Wasps/Yellowjackets/Hornets
- Parson Spider
- Parthenice Tiger Moth
- Pavement Ants
- Pennsylvania Wood Roach
- Pharaoh Ant (Univ. of Minnesota Extension)
- Picnic Beetles (Univ. of Minnesota Extension)
- Pillbugs (Univ. of Maryland / UMD Cooperative Extension)
- Pine Needle Scale (US Forest Service)
- Plum Curculio (Cornell)
- Polyphemus Moth (Butterflies and Moths of North America Project)
- Pond Skaters (Water Striders)
- Potato (and other) Aphids (part of UMaine Extension’s Potato IPM Program)
- Potato Leafhopper (part of UMaine Extension’s Potato IPM Program)
- Powderpost Beetles
- Praying Mantids (Univ. of Kentucky)
- Predaceous Diving Beetles (BugGuide.net)
- Pseudoscorpions (BugGuide.net)
- Rabbit Tick
- Raspberry Insect Pests:
- Raspberry Cane Borer (PDF) (Univ. of New Hampshire Cooperative Extension)
- Raspberry Cane Maggot (PDF) (Univ. of New Hampshire Cooperative Extension)
- Raspberry Crown Borer (Univ. of New Hampshire Cooperative Extension)
- Raspberry Fruitworm (Univ. of Minnesota Extension) | Photo of Raspberry Fruitworm Adult (Beetle) (scroll to bottom of page once there) (Univ. of New Hampshire Cooperative Extension)
- Red-necked Cane Borer (Penn State Extension)
- Raspberry Weevil
- Spotted-wing Drosophila (see Fruit Flies)
- Red-banded Leafroller (Cornell)
- Red-headed Ash Borer (BugGuide.net)
- Redheaded Flea Beetle (part of UMaine Extension’s Cranberry IPM Program)
- Redhumped Caterpillars (Washington State University)
- Red-necked Cane Borer (Penn State Extension)
- Red Flat Bark Beetle (Penn State / New Kensington) (Maine specimen/photo)
- Red Flour Beetle
- Rhododendron Leafhopper (BugGuide.net)
- Rice Weevil
- Roaches / Cockroaches
- Robber Flies (NC State Extension)
- Rose Chafer
- Rose Leafhopper (Univ. of Washington)
- Rose Sawflies (three foliage-feeding species) (Univ. of Minnesota Extension)
- Roundheaded Apple Tree Borer (Cornell)
- Rove Beetles (Iowa State Univ.)
- San Jose Scale (Cornell)
- Sap Beetles (Univ. of Minnesota Extension)
- Sand Wasps (Missouri Dept of Conservation)
- Sawflies (a nice overview of sawflies via Univ. of Wisconsin Extension)
- Elm Sawfly
- Dogwood Sawfly (Iowa State Univ Extension) (additional images, including the adult stage: BugGuide.net)
- European Apple Sawfly
- European Pine Sawfly
- Introduced Pine Sawfly
- White Pine Sawfly
- Sawtoothed Grain Beetles
- Sawyer Beetles
- Scorpionflies (Univ. of Kentucky)
- Seabird Tick
- Seed Corn Maggot (Univ. of Minnesota Extension)
- Silverfish (and Firebrats)
- Six-spotted Tiger Beetle (BugGuide.net)
- Slug Caterpillars (BugGuide.net)
- Slugs
- Small-headed Fly
- Snails
- Snowfleas
- Sod Webworm (Penn State)
- Solitary Ground-nesting Bees (Cornell)
- Southern Corn Rootworm (includes Western & Northern) (University of Illinois)
- Southern Pine Beetle (Dendroctonus frontalis) (invasive) — Detected in Waterboro, Maine in October, 2021 (Maine Forest Service) | Some Photos of the Southern Pine Beetle (BugGuide.net)
- Sowbugs (Univ. of Maryland / UMD Cooperative Extension)
- Spider Beetles (people sometimes mistake these for spiders, bed bugs, or ticks)
- Spiders
- Spider Mites
- Spongy Moth
- Spotted Asparagus Beetle
- Spotted Lanternfly (planthopper) (find it on our Invasive Species page)
- Spotted Tentiform Leafminer (Cornell)
- Spotted Tussock Caterpillar
- Spotted Wing Drosophila (invasive) (see Fruit Flies)
- Springtails / Snowfleas
- Spruce Budworm
- Squash Beetles / Squash Lady Beetles
- Squash Bugs
- Squash Vine Borer (Penn State) (larva photo) (adult photo via BugGuide.net)
- Squirrel Tick
- Stable Fly (University of Florida)
- Stalk Borer / Common Stalk Borer
- Stink Bugs
- Stoneflies (BugGuide.net)
- Strawberry Clipper Weevil (also called Strawberry Bud Weevil) (Anthonomous signatus Say) (Cornell)
- Strawberry Root Weevil (Otiorhynchus ovatus)
- Strawberry Root Weevil (Oregon State University Extension)
- Home-invading Weevils (University of Minnesota Extension)
- Strawberry Rootworm
- Strawberry Seed Beetle
- Striped Cucumber Beetle
- Sugar Maple Borer (BugGuide.net)
- Sweat Bees (BugGuide.net)
- Syrphid Flies (also called Hover Flies or Flower Flies)
- Tachina (Tachinid) Flies (BugGuide.net)
- Tachinid Fly (Hystricia abrupta) (BugGuide.net)
- Tachinid Fly (genus Cylindromyia) (BugGuide.net)
- Tanbark Borer / Violet Tanbark Beetle (BugGuide.net)
- Tarnished Plant Bug
- Tawny Garden Slug
- Tent Caterpillars: Eastern Tent Caterpillars and Forest Tent Caterpillars
- Termites (PDF) (Cornell University) — Rare in Maine; mostly occur only in pocket areas in some southern and coastal locations.
- ‘The Laugher’ caterpillar
- Thief Ant (University of Minnesota Extension)
- Three-lined Potato Beetle [pdf] (UNH)
- Thrips (vectors of tospoviruses including Tomato Spotted Wilt Virus and Impatiens Necrotic Spot Virus)
- Ticks
- Tiger Beetles (Texas A&M)
- Tiger Beetles of Vermont (iNaturalist)
- Maine IF&W: Rare Tiger Beetles
- Ground and Tiger Beetles (Penn State)
- Six-spotted Tiger Beetle (BugGuide.net)
- Tobacco Hornworm
- Toe-Biter (also called Giant Water Bug)
- Tomato Hornworm
- Tortoise Beetles
- Tussock Caterpillars
- Two-Spotted Spider Mites
- Varied Carpet Beetle
- Vegetable Leafminer (University of Florida)
- Viburnum Leaf Beetle
- Viburnum Leaf Beetle (PDF) (Cornell)
- Viburnum Leaf Beetle (Oregon State University) (good photos)
- Viburnum Leaf Beetle (UMass)
- Violet Tanbark Beetle (from oak firewood) (BugGuide.net)
- Virginia Ctenucha (Butterflies and Moths of North America project)
- Wasps/Hornets/Yellowjackets
- Water Boatmen (UWM)
- Water Scavenger Beetles (Texas A&M)
- Waterscorpions
- Water Striders
- West Nile Virus (CDC)
- Western Conifer Seed Bug
- Western Corn Rootworm (includes Northern and Southern also) (University of Illinois)
- Whiteflies (University of Missouri)
- Whitespotted Sawyer Beetle
- White Apple Leafhopper (Univ. of Washington)
- White Grubs
- White Pine Sawfly
- White Pine Weevil
- Winter Cutworm – Noctua pronuba (Oregon State Univ)
- Winter Firefly
- Winter Moth (Maine Forest Service) [see also Control of Winter Moth Damage in New England (PDF) Blueberries — UMass] [2012 Bangor Daily story] and the Maine Forest Service Press Release (Nov-Dec 2015) “When moths fly with snow, let the Maine Forest Service know!”
- Winter Tick
- Wireworms
- Woodchuck Tick
- Wood Tick/American Dog Tick
- Wood Roaches
- Woollybear Caterpillars (BugGuide.net): Banded Woollybear and Yellow Woollybear
- Yellowjackets/Hornets/Wasps
- Yellownecked Caterpillars (Penn State University)
- Yellow-striped Armyworm (BugGuide.net) [see also Yellowstriped Armyworm (Univ. of Florida)]
- Yellow Woollybear (BugGuide.net)