Vector Type
Ticks
Vector Species Name
Dermacentor andersoni
Vector Common Name
Rocky Mountain Wood Tick

Vector Information

Rocky Mountain wood ticks are found in Rocky Mountain states and Southwestern Canada from elevations of 4,000 to 10,500 feet. These ticks are able to transmit Rocky Mountain spotted fever, Colorado tick fever, and tularemia. The adult ticks feed primarily on large mammals while the larvae and nymphs feed on small rodents. These ticks are found primarily in scrublands, lightly wooded areas, and open grasslands. They are most active between January and November but are less active during summer months. The larvae have six legs while the nymphs and adults have eight legs. Adult females look similar to the American Dog tick. They are dark brown with a cream colored gray  scutum. The adult males scutum is mottled with brown markings overall on a dark brown body. 

Found In
AZ
CA
CO
ID
KS
MT
NE
NV
NM
ND
OK
OR
SD
UT
WA
WY

*Disease transmission varies locally. This map depicts where vectors can be found geographically and provides information about diseases these vectors might carry. Vectors might be present in a state or locality, however, and not be carriers of any particular disease. In addition, identified vectors may have a presence in a state, but may not be found throughout that state.