Read Me for refugeSeekingBehavior.csv This file contains the results from experiments to determine whether the body temperature threshold for refuge-seeking behavior varies among differten populations of Battus philenor across the United States. Columns: Date: DDMMYYYY, day on which caterpillar was tested State: State abbreviation where parent of caterpillar was collected Site: Number of site where parent of caterpillar was collected; see Table 1 in the text for site names and other details Lat: decimal degrees, Latiude of site Long: decimal degrees, Longitude of site HighSiteTemp: degrees Celsius, Mean annual high temperature at site. Estimated from nearest NWS weather station. See Table S1 in the supplemental material for more detail. Mass: g, mass of caterpillar Eating: Binary (Y=yes/N=no), whether the caterpillar ate the host leaf at any point during the trial MeanTemp: degrees Celsius, mean body temperature of the caterpillar when started refuge seeking, estimated by averaging from a thermal image, see Methods for more detail MedianTemp: degrees Celsius, as meanTemp except the median body temeperature instead Notes: other observations during trial; individuals marked sand moved to the sand during the trial, rather than the refuge, and were excluded from analysis; the one individual marked died started refuge seeking, but died from overheating before successfully doing so.