This picture features American dig ticks (Dermacentor variablis) and black-legged ticks (Ixodes scapularis). To the right of the postage stamp is two stages of the black-legged tick. They are a female (largest) and male (intermediate). The two small specimens on the stamp itself are nymphal black-legged ticks. The two ticks to the left are male and female American dog ticks. Photo by Jim Occi.