Bug Identifier
American Dog Tick
Community identification

American Dog Tick

Dermacentor variabilis

Order & Family
Order Ixodida, Family Ixodidae
Size
3mm to 5mm (unfed adults); can grow up to 15mm when fully engorged.
See this bug in the Encyclopedia

Natural Habitat

Found in areas with little or no tree cover, such as grassy fields, walkways, and trails, particularly in the Eastern and Gulf Coast regions of North America.

Diet & Feeding

Obligate hematophage (blood-feeder) that feeds on the blood of mammals, including dogs, horses, and humans.

Behavior Patterns

Employs a 'questing' behavior where it climbs to the tips of grasses to wait for a host to pass by. It has a three-host life cycle (larva, nymph, adult) which usually takes two years to complete.

Risks & Benefits

Poses significant health risks as a primary vector for Rocky Mountain spotted fever and tularemia. It can also cause tick paralysis in dogs and humans. It has no known benefits to the human ecosystem.