American Dog Tick

Scientific Name: Dermacentor variabilis

Order & Family: Acari, Ixodidae

Size: Unfed adults are typically 3-5mm; engorged females can reach up to 15mm.

American Dog Tick

Natural Habitat

Grassy areas, woodlands, along trails, and near human habitation. They often climb onto vegetation to wait for hosts.

Diet & Feeding

Blood of mammals, including humans, dogs, and other wild and domestic animals. Life stages (larva, nymph, adult) each feed once.

Behavior Patterns

Questing behavior: Ticks climb onto vegetation and extend their front legs, waiting to grab onto a passing host. They are active from spring through summer. Larvae and nymphs often feed on small mammals, while adults prefer larger mammals.

Risks & Benefits

Risks: Can transmit diseases such as Rocky Mountain spotted fever and tularemia to humans. Can cause tick paralysis in some animals. Benefits: No significant known benefits to humans, though they are a food source for some insectivorous animals.

Identified on: 9/28/2025