Relationship between individual-level temperature preference (Tpref) and Batrachochytrium dendrobatidis (Bd) growth on frogs for (a) Atelopus zeteki and (b) Anaxyrus terrestris. Atelopus zeteki, which preferred the coolest temperatures (figure 1), showed a positive relationship between Bd growth rate on individual hosts and host Tpref (F1,11 = 4.73, p = 0.05), indicating that Bd grew better on this species at warmer temperatures. By contrast, Anaxyrus terrestris, which preferred the warmest temperatures (figure 1), showed a negative relationship between Bd growth on individual hosts and host Tpref (F1,11 = 8.86, p = 0.01), indicating that Bd grew better on this species at cooler temperatures.