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Fig. 5. Relative hindlimb bone stresses for femora (A) and tibiae (B) across the
range of body masses in this study. Red circles represent vampire bats (D.
rotundus, D. youngi), black circles represent other species. According to
the hindlimb-strength hypothesis, the non-vampires should have relative bone
stress values greater than that of D. youngi tibiae (1.0).