Simultaneous measurements of evaporative water loss and CO2 production were performed on representatives of 4 spp. of Australian parrots resting at 25[degree]C. and 25% relative humidity. Evaporative losses averaged 7.7% of body weight day in Neophema bourkii (body weight, 35 g), 8.1%/day in Neophema petrophila (weight, 41 g), 4.2% day in Nymphicus hollandicus (weight, 81 g), and 2.6%/day in Platycercus zonarius (weight, 137 g). These values are in general agreement with comparable ones for birds of other orders. Calculations based on rates of CO2 production indicate that metabolic water production by these parrots does not offset water losses through evaporation.