Two ticks in their nymphal stage: At left, the longhorned tick, native to Asia and a recent arrival in the U.S. At right, the lone star tick, found in the eastern United States and in Mexico.
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Two ticks in their nymphal stage: At left, the longhorned tick, native to Asia and a recent arrival in the U.S. At right, the lone star tick, found in the eastern United States and in Mexico.