Bug Identifier
American Dog Tick
Community identification

American Dog Tick

Dermacentor variabilis

Order & Family
Order: Ixodida, Family: Ixodidae
Size
Adults are approximately 3-5 mm in length, but can grow up to 15 mm when fully engorged.
See this bug in the Encyclopedia

Natural Habitat

Commonly found in areas with little or no tree cover, such as grassy fields, walkways, and trails.

Diet & Feeding

Hematophagous (blood-feeding); larvae and nymphs feed on small mammals, while adults prefer dogs and other large mammals, including humans.

Behavior Patterns

Four-stage life cycle: egg, larva, nymph, and adult. They exhibit 'questing' behavior by climbing to the tips of grass or shrubs to wait for a host to pass by.

Risks & Benefits

A major risk to humans as they are primary vectors of Rocky Mountain spotted fever (RMSF) and tularemia; they can also cause tick paralysis. They provide no significant benefits to humans.