Fig. 5

Calculations of night parrot environmental conditions and thermal, hydric and energetic state in 2015 at the study site: a hourly soil surface temperature (red), 4 cm air temperature in the open (orange) and experienced air temperature (light blue – either in the open or in the shade or in between, depending on the simulated behaviour of the parrot), with dashed horizontal lines indicating 38 °C (resting core body temperature) and 45 °C (near lethal body temperature), and vertical blue lines indicating rainfall (mm); b hourly parrot core temperature (bright red), skin temperature (dark red) and outer feather temperature (orange); c hourly discretionary energy (assimilated energy minus maintenance costs) when feeding at maximal simulated intake on seed (red), succulents with 25% water (orange) and succulents with 55% water (blue); d hourly evaporative water loss rate; e daily percentage body mass of water lost (i.e. negative values represent discretionary water); f daily cumulative dehydration, with rainfall events > 1 mm permitting complete rehydration on a given day