American Dog Tick
Scientific Name: Dermacentor variabilis
Order & Family: Ixodida: Ixodidae
Size: 3mm to 5mm (unfed), can grow up to 15mm when fully engorged.

Natural Habitat
Grassy areas, low-lying brush, and wooded paths, often in areas frequented by dogs or humans.
Diet & Feeding
Obligate blood-feeders; they consume blood from mammals, including dogs, deer, and humans.
Behavior Patterns
They utilize 'questing' by clinging to vegetation with back legs while stretching front legs to grab passing hosts. They have a three-host life cycle (larva, nymph, adult).
Risks & Benefits
Primary vector of Rocky Mountain spotted fever and Tularemia. They can also cause tick paralysis. They have no known benefits to human interest but serve as a food source for some birds and reptiles.
Identified on: 6/10/2026