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Home and Garden IPM from Cooperative Extension

Photo Gallery: Critters of Medical and Veterinary Significance

: American Cockroach (female)

: American Cockroach (female)

: Egg Case (Ootheca) from an American Cockroach

: American Cockroaches
(Male versus Female)

: Bald-faced Hornets (guarding their nest)

: Bald-faced Hornet

: Bed Bugs (various instar stages; two smaller nymphs [top of photo] and two adults [lower right])

: A pair of Bed Bug eggs next to a US penny

: Bed Bug (adult female) (7/25/2024)

: Bed Bug (adult female)

: Bed Bugs (two adult females) (4/26/2023)

: Size Comparisons: Adult Bed Bug (Left), Bed Bug Nymph (Middle), and Sesame Seed (Right)

: The hollow exoskeleton left behind by a bed bug that molted (dorsal view)

: Bed Bug (male) (dorsal view) (4/27/2022)

: Bot Fly (Genus Cuterebra) (likely either the Mouse Bot, C. fontinella, or Rabbit Bot, C. buccata) (Portland, ME; 6/18/2022) (Photo courtesy of Hazen Camber)

: Browntail Moth (late instar caterpillar stage)

: Browntail Moth (late-instar caterpillars feeding on wild apple leaves; Lincolnville Center, ME – 6/5/2019)

: Browntail Moth (late instar caterpillar on a wild apple leaf; Lincolnville Center, ME – 6/5/2019)

: Browntail Caterpillars on a crabapple tree in Waterville, Maine; 5/12/2021 (Photo courtesy of Jamie Graves)

: Browntail Moths; note the brown ‘tail’ at the end of the abdomen (Kennebec County, Maine, 7/1/2021)

: Closer view of some Browntail Moths from the adjacent photo (Kennebec County, Maine, 7/1/2021)

: Example of an unfortunate reaction to the Browntail caterpillar hairs on a person’s fingers. May 23rd, 2022.

: Example of a typical reaction to the Browntail caterpillar hairs on a person’s arm. July 12th, 2021.

: An example of a bad case of the skin rash that the hairs from the browntail caterpillars–and later on their cocoons–can cause. Staff Photo, taken 5/26/21.

: Female Deer Ticks — adult (left) and a nymph (right); female deer ticks–adults as well as nymphs–are capable of spreading Lyme disease. (see also Tick Photos)

: Deer Tick and Dog Tick (side-by-side comparison) (both are non-engorged / have not fed; both are females) (see also Tick Photos)

: Engorged Ticks (Deer Tick versus Dog Tick) (see also Tick Photos)

: Dog Tick (engorged female) (see also Tick Photos)

: Woodchuck Ticks (see also Tick Photos)

: Black Flies (their larvae are aquatic)

: Deer Fly (their larvae are aquatic)

: Deer Flies (additional examples)

: Fleas (Cat Flea shown here)

: Cat Flea bites on a child’s feet and legs

: German cockroach (female) (Blattella germanica)

: Giant Water Bug (“Toe-biter”)

: Giant Water Bug (“Toe-biter”)

: Giant Water Bug (“Toe-biter”)

: Head Lice

: Head Louse

: Hickory Tussock (the hairs on many tussock caterpillars can cause an itchy rash)

: Horse Fly

: Horse Fly

: Horse Flies (additional examples)

: Mosquito larvae

: Mosquito Larvae

: Mosquito

: Mosquito (Ochlerotatus canadensis)

: Guinea Paper Wasps (Polistes exclamans)

: Golden Paper Wasp (also known as Northern Paper Wasp)

: Spiders

: Dangerous spiders are non-native / rarely found in Maine. Visit our Spiders page for more information.

: Example of a Spider Beetle (Spider Beetles are small beetles that superficially resemble spiders but are harmless)

: Stable Fly

: Ticks (ticks are often found indoors after hitching a ride on a person or a family pet)

: Yellowjackets

Additional Photos and Information:

American Cockroaches
American Dog Tick
Bald-faced Hornets
Bed Bugs
Bird Mites [will bite people in the absence of their bird host(s) but they cannot reproduce without bird blood] (University of Minnesota Extension)
Black Flies
Black-legged Tick/Deer Tick
Bot Flies (BugGuide.net)
- Mouse Bot Fly Cuterebra fontinella (BugGuide.net)
- Rabbit Bot Fly Cuterebra buccata (BugGuide.net)
- Bot fly larvae and pupae (BugGuide.net)
Browntail Caterpillar/Moth (the hairs on the moths are not toxic but there are microscopic hairs on the caterpillars that most definitely are toxic)
Cockroaches
Deer Flies
Deer Tick
Fleas
German Cockroaches
Head Lice
Hickory Tussock Caterpillar
Hornets/Wasps/Yellowjackets
House Dust Mites
House Flies
Mites
- Bird Mites [will bite people in the absence of their bird host(s) but they cannot reproduce without bird blood] (University of Minnesota Extension)
- Dust Mites
- Parasitic Mites of Humans (University of Kentucky)
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
Mouse Bot Fly Cuterebra fontinella (BugGuide.net)
Paper Wasps
Rabbit Bot Fly Cuterebra buccata (BugGuide.net)
Spider Beetles (people sometimes mistake these for spiders, bed bugs, or ticks)
Spiders
Stable Flies (blood-sucking fly pests of cows and horses but which will also bite people, usually on and around one’s ankles; their bite is rather painful) (superficially resemble house flies) (University of Florida)
Ticks and Tick Photos
Toe-Biter (also called Giant Water Bug)
Tussock Caterpillars
Woodchuck Tick (Powassan Virus Disease)
Wood Tick/American Dog Tick
Yellowjackets/Hornets/Wasps

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