|Description = This is a male ''Ixodes ricinus'' tick (smaller) shown copulating with a female tick (larger). ''I. ricinus'', the "castor bean" tick, so called because of its resemblance to the castor bean, is a vector for the ''B. burgdorferi'' spirochete, the cause of Lyme disease, and is commonly found on farm animals, and deer who are the natural host. | |Description = This is a male ''Ixodes ricinus'' tick (smaller) shown copulating with a female tick (larger). ''I. ricinus'', the "castor bean" tick, so called because of its resemblance to the castor bean, is a vector for the ''B. burgdorferi'' spirochete, the cause of Lyme disease, and is commonly found on farm animals, and deer who are the natural host. |