Rocky Mountain Wood TickScientific Name: Dermacentor andersoni

Known Location(s):

  • Rocky Mountain States*
  • Southwestern Canada*

*Found in elevations from 4,000 to 10,500 feet

Centers for Disease Control and Prevention - Rocky Mountain Wood Tick

This map is not meant to represent risks for a specific tick-borne disease, because disease transmission is influenced by multiple factors beyond mere tick presence. This map has been designed to answer the question “What ticks should I be concerned about at a regional scale?” Please consult a local public health authority or USDA Agricultural Extension Office to determine more specific information at the state, county, or municipal level. Background data for this map is from the US National Atlas.

Sighting and Biting notes:

  • Spring, summer and fall are greatest risk of being bitten.
  • However, adults may be out searching for a host anytime winter temperatures are above freezing.
  • Nymphs and adult females are most likely to bite humans.

Potential to Carry: 

  • Colorado Tick Fever
  • Rocky Mountain Spotted Fever
  • Tularemia

References:

  • U.S. Department of Health and Human Services; Centers for Disease Control and Prevention (2017, May 12).  TICKBORNE DISEASES OF THE UNITED STATES A Reference Manual for Health Care Providers Fourth Edition, 2017.Centers for Disease Control and Prevention. Retrieved from https://www.cdc.gov/lyme/resources
  • U.S. Department of Health and Human Services; Centers for Disease Control and Prevention, Office of the Associate Director for Communications, Division of Public Affairs; James Gathany. (Photographer). (2008). Public Health Image Library. Retrieved from https://phil.cdc.gov/