BROWN DOG TICK Size (Unengorged): 1/8 inch long Size (Engorged): 1/2 inch long Shape: Body flattened dorsovertrally (top to bottom) Color: Reddish brown, but when engorged can change to gray-blue or olive. This tick is commonly found on dogs. Although this is the species most commonly found indoor, it rarely attacks man. It can be found throughout the United States and the world.

AMERICAN DOG TICK Size (Unengorged): about 3/16 inch long Size (Engorged): up to 5/8 inch long and 3/8 wide Shape: Oval, dorsoventrally flattened Color: Brown with whitish to grayish markings on scutum This tick gets its name because it is found only in North America and domestic dogs are its preferred host. Although not normally a structural pest, it is often found on dogs and readily attack humans. It can be a vector for Rocky Mountain Spotted Fever and tularemia.

ROCKY MOUNTAIN WOOD TICK Size (Unengorged): About 1/8 inch long Size (Engorged): Up to 5/8 inch long and 1/2 inch wide Shape: Body oval, dorsoventrally flattened Color: Brown, becoming grayish when engorged This tick is found primarily in the Rocky Mountain states and the preferred habitat is the woods to meadow/lawn transition zone. Although not a structural pest, this tick is the primary vector for Rocky Mountain Spotted Fever as well as Colorado Tick Fever and tularemia.

BLACKLEGGED / DEER / BEAR TICK Size (Unengorged): About1/8 inch long Shape: Oval, dorsoventrally flattened Color: Orange brown except the legs, which are dark The preferred host is the white-tailed deer. This tick is very important because it is a vector of Lyme disease. They are found primarily in the northeastern, midwestern, and southeastern states in the United States, but extend into Mexico as well.

COMMON FOWL TICK Size (Unengorged): About 1/8 to 1/2 inch long Size (Engorged): Up to 1/2 long and 1/4 inch wide Shape: Body oval but wider behind, flattened dorsvoventrally with definite impressed line separating top and bottom. No eye present. Color: Brown, but turns bluish when engorged This is an important parasite of fowl, especially poultry. They are a concern because they will attack humans in poultry houses as well as when they occasionally invade homes near poultry houses. They are vectors of avian spirochetosis in fowl. They are most common in southern states.

RELAPSING FEVER TICK Size (Unengorged): About 1/4 to 3/8 inch long and 3/16 to 1/4 inch wide Shape: Oval, flattened dorsoventrally Color: Gray, turning a deep red with grayish blue tint when engorged These ticks are a major vector for relapsing fever in the southern and western United States.