Taxa included in this study, along with sample size, body mass, limb specializations, posture, and source locality.

For the purposes of this study, cursorial denotes limb adaptations and behavior regarding high speed or sustained periods of terrestrial locomotion. Scansorial denotes limb adaptations and behavior regarding climbing, whereas natatorial describes limb adaptations and behavior regarding aquatic locomotion. Fossorial indicates limb adaptations and behavior regarding digging, either in search of food items or burrowing. As body mass can greatly vary with geographic location, the source locality for each species is listed with state/province in parentheses. Body mass values listed in grams.†Body mass taken from Smith et al. [24] and not directly from specimen(s).*Zoo specimens.