... temperature ( T b ). Whereas diurnal birds can potentially rehydrate throughout the day, nocturnal species typically forgo drinking between sunrise and sunset. We hypothesized that nocturnal birds have evolved reduced rates of evaporative water loss (EWL) and more economical evaporative cooling mechanisms...

...Vincent van der Vinne; Jenke A. Gorter; Sjaak J. Riede; Roelof A. Hut ABSTRACT Endogenous daily (circadian) rhythms allow organisms to anticipate daily changes in the environment. Most mammals are specialized to be active during the night (nocturnal) or day (diurnal). However, typically nocturnal...

.... We monitored foraging activity and identified the ants' temperature tolerance in the laboratory by determining (1) critical thermal minima and maxima (CT min and CT max ) and (2) the relationship between walking speed and temperature. Ants of Myrmecia croslandi were diurnal throughout the year...