Medical and Veterinary - Home and Garden IPM from Cooperative Extension - University of Maine 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)

: Bed Bugs (left: male; right: female) (4/26/2023)

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

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

: 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)

: 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)

: Northern Paper Wasp (Polistes fuscatus) (known also by three other common names: Dark Paper Wasp, Golden Paper Wasp and the Common 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