Bug Identifier
American Dog Tick
Community identification

American Dog Tick

Dermacentor variabilis

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

Natural Habitat

Grassy areas, wooded paths, and zones with low vegetation where hosts are likely to pass.

Diet & Feeding

Hematophagous; feeds on the blood of mammals, including dogs and humans.

Behavior Patterns

Uses a behavior called questing where it climbs to the tips of vegetation and waits for a host to brush by. It has a three-host life cycle involving larval, nymphal, and adult stages.

Risks & Benefits

Known vector for Rocky Mountain spotted fever and Tularemia. It can also cause tick paralysis in hosts. There are no known benefits to humans or the ecosystem.