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.