| Castor bean tick, Ixodes ricinus | Characters: |
- Ticks are ectoparasites (external parasites), living by hematophagy on the blood of mammals, birds, and sometimes reptiles and amphibians.
- Ticks, like mites, have bodies which are divided into two primary sections: the anterior capitulum (or gnathosoma), which contains the head and mouthparts; and the posterior idiosoma which contains the legs, digestive tract, and reproductive organs.
- Ticks satisfy all of their nutritional requirements on a diet of blood, a practice known as hematophagy.
- Like all arachnids, ticks have eight legs. The legs of Ixodidae and
Argasidae are similar in structure. Each leg is composed of six
segments: the coxa, trochanter, femur, patella, tibia, and tarsus. Each
of these segments are connected by muscles which allow for flexion and extension,
however the coxae have limited lateral movement. When not being used
for walking, the legs remain tightly folded against the body.
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