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Several examples of tick found in the United States

Ticks are a group of species of arachnid known for their parasitic life-style. They have four pairs of legs and are effectively balloons with mouth parts. They are known for transmitting Lyme disease, usually by the sheep or castor bean tick, Ixodes ricinus.[1]

Ticks have a complex life cycle involving both nymphal and pupal stages, which requires blood meals between each. There are two main subgroups of ticks, hard ticks and soft ticks.