Venomous Animals of Arizona. The University of Arizona.
Ticks are saclike acarines with a leathery appearance.
Ticks also have four stages in their life history, and all require blood from a vertebrate host to survive and complete their life cycle. Although there are many species of ticks in Arizona, humans are likely to encounter only three. Longitudinal section of generalized tick mouth parts showing chelicera and pharynx. All rights reserved.