Plot of individual (a) Anaxyrus terrestris (n = 36) and (b) Osteopilus septentrionalis (n = 25) preferred body temperature. A. terrestris and O. septentrionalis mean preferred body temperatures were 23.8 °C (±0.17 °C) and 22.8 °C (±0.50 °C), respectively. Individuals exhibited consistency in their preferred body temperature (main effect of day: F = 1.32, df = 3, p = 0.27 and F = 0.26, df = 3, p = 0.86) but there was significant variation among individuals in preferred body temperature (within-individual variance and repeatability: s2 = 17.5, r = 0.99 and s2 = 9.5, r = 0.99).