FIGURE 3.

Number of reviewed studies that performed surveillance on ticks and different animal types and the species that were studied^†. Bar graphs display the (a) number of reviewed studies performing surveillance on ticks, small mammals, large mammals, and birds; (b) the number of reviewed tick surveillance studies by Ixodes species collected; (c) the number of reviewed animal surveillance studies by species of large mammals collected; (d) the number of reviewed animal surveillance studies by species of small mammals collected.