1. Bivariate plots of mean total scratches and mean total pits for natural grazers.
Bivariate plots of mean total scratches and mean total pits for natural grazers. Pits and scratches in each image were counted by two observers (A, observer 1; B, observer 2). Images were from naturally grazing Wyoming sheep and a grazer from Red Buttes, WY, USA; the 95% confidence intervals are shown for each treatment (shaded; see Fig. 3) and the natural grazers (dashed line).
Jonathan M. Hoffman et al. J Exp Biol 2015;218:
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