Rocky Mountain Wood Ticks

Dermacentor andersoni

The most common species of tick found in Lethbridge is the Rocky Mountain Wood Tick. They are generally most active in Lethbridge during the spring, from late March – June.

Rocky Mountain Wood Ticks climb onto tall grasses and short shrubs and hang there in a resting position. They will wait until animals pass by and climb onto them. Adult ticks feed on blood from animals such as: deer, porcupines, dogs, and people. Lyme disease is not transmitted by this species of tick.

Learn more

Reduce the chances of being bitten
  • Avoid walking or sitting in areas with long grass or short shrubs.

  • Tuck your pant cuffs inside your boots or socks.

  • Use spray repellents containing DEET.

  • Walk on paved trails to avoid encountering ticks.

Tick Checks
  • Regular tick checks while walking in natural areas are an effective preventative measure, as ticks are easy to spot on clothing.

  • Check for ticks on your sleeves and collar, pant legs and socks.

  • When you get home, thoroughly check your head and hairy places. Check your pets too!

If you find a tick
  • A tick that has not bitten you can easily be brushed off.

  • If a tick has attached itself to your skin, grasp it firmly as close to the skin as possible with clean tweezers. Slowly pull straight back to remove it; do not twist. Wash the bite area with soap and water.

    • If you have been bitten by a tick and are worried about your health contact Health Link at 811. They can refer you to a resource that is appropriate to your situation.

    • If you plan to follow up with a doctor after removing an attached tick, take a photo of the tick or seal it in a small bag.

Did you know?

You can submit your tick sightings to https://etick.ca/ - this Canadian citizen science project helps to monitor tick populations and provides expert identification of ticks.

Rocky Mountain Spotted Fever

Rocky Mountain Wood Ticks are a species of tick that can transmit Rocky Mountain Spotted Fever. Symptoms are severe headaches and a continuous fever. These symptoms occur within 3 – 10 days after being bitten by a tick. A few days after an attached tick has been removed a peculiar skin rash appears on the arms, legs, and other parts of the body. This disease can be fatal, but in the prairie provinces it is very rare. There is no need to avoid outdoor activities for fear of ticks, as long as a few simple precautions are taken to reduce your chances of being bitten.

Lyme disease is not transmitted by Rocky Mountain Wood Ticks. The Ixodes species of ticks transmit Lyme disease, these ticks have not been found in the Lethbridge region.

Lifecycle

Generally Rocky Mountain Wood Ticks will take 2 years to complete their lifecycle in southern Alberta. Their lifecycle is quite complex as they go through egg, larvae, nymph, and adult stages. Only adult Rocky Mountain Wood Ticks feed on larger mammals such as deer, people, or dogs. During their other lifecycle stages these ticks feed on smaller hosts such as mice or ground squirrels.

Ticks find shelter between the soil and ground cover, like leaf litter, to overwinter. In the early spring, shortly after the snowmelt, they emerge and begin seeking hosts. They will actively search for hosts by climbing to the tips of long grass blades and short shrubs waiting for appropriate hosts to brush past.

For more information about the Rocky Mountain wood tick lifecycle visit the University of Saskatchewan’s website: Dermacentor andersoni: the Rocky Mountain wood tick - Learn About Parasites - Western College of Veterinary Medicine - University of Saskatchewan (usask.ca)

More Living with Wildlife Tip Sheets

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The City of Lethbridge acknowledges that we are gathered on the lands of the Blackfoot people of the Canadian Plains and pays respect to the Blackfoot people past, present and future while recognizing and respecting their cultural heritage, beliefs and relationship to the land. The City of Lethbridge is also home to the Metis Nation of Alberta, Region III.