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The effect of temperature on the proportion of ticks questing in Ixodes ricinus sampled from northeast Scotland (black squares), North Wales (open circles), South England (black triangles) and crosses (central France). French ticks were not tested at 6°C or 15°C. Unadjusted means with standard error bars are shown. Points for South England and North Wales have been shifted slightly to allow room for standard error bars.
