Species Insects & ArthropodsAmerican Dog Tick

American Dog Tick

Dermacentor variabilis

CommonInsect & Arthropod
Illustration of American Dog Tick (Dermacentor variabilis)
Safety note: Check for ticks after outdoor activity.

The American Dog Tick is one of the most commonly encountered ticks in eastern North America, with a distinctive mottled cream-and-brown pattern on its scutum. It is a vector of Rocky Mountain spotted fever and tularemia. Adults prefer dogs and large mammals as hosts, while immature stages feed on small rodents. It is active from spring through early summer.

Habitat
Grassy fields, roadsides, and forest edges with meadow vegetation
Diet
All stages: blood of small mammals, dogs, deer, and humans
How common
Common

Best time to see a American Dog Tick

The best time to see a American Dog Tick is April–June, when about 76% of U.S. sightings happen, based on 22,711 research-grade iNaturalist observations.

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Not certain it is a American Dog Tick? What bug is this? walks through what to check first and the lookalikes that catch people out.

Recent American Dog Tick sightings near you

Live, research-grade observations from iNaturalist. Allow location to center the map on you.

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