
Community identification
Dog Tick (American Dog Tick)
Dermacentor variabilis
- Order & Family
- Order Ixodida, Family Ixodidae
- Size
- 3 to 5 mm (unfed), adults can expand to 15 mm when fully engorged.
Natural Habitat
Found in areas with high grass or low-lying brush, particularly along woodland edges and grassy trails.
Diet & Feeding
Hematophagous (blood-feeding); larvae and nymphs feed on small mammals, while adults prefer dogs and larger mammals, including humans.
Behavior Patterns
They utilize 'questing' by climbing to the tips of vegetation and extending their legs to latch onto passing hosts; they undergo four life stages: egg, larva, nymph, and adult.
Risks & Benefits
High risk as a vector for Rocky Mountain spotted fever and tularemia; they can also cause tick paralysis in both dogs and humans. They serve a limited ecological role as a food source for some birds and reptiles.