Fig. 3

a A distribution map of the daily heterotherms (DT, circles) and hibernators (HIB, triangles) reviewed in Ruf and Geiser [29]. Latitudes were taken from Table 1 of [29], longitudes from the PanTHERIA database [165], representing the mid-point of the species’ range. Heterotherms with strictly seasonal, predictable torpor patterns are depicted in blue, those with unpredictable or spontaneous torpor use are marked in red and those that are data deficient (see text) in black. b Frequency distribution of each classification within daily heterotherms and hibernators