Fig. 4. Boxplots of residual log₁₀COT, controlling for (A) body mass and (B) L_E, for semi-aquatic (white), generalist (gray) and cursorial (black) species. Number of species in each locomotor group is shown below each category heading. (C) Log₁₀ residuals of L_E and COT controlling for body mass for each locomotor group. Squares indicate group means, error bars indicate standard error. Shading indicates locomotor group as in A. COT, cost of transport; L_E, effective limb length.