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Table 1 Endotherm model parameters for the budgerigar/night parrot model, with values specific to the night parrot in brackets

From: An estimate of the water budget for the endangered night parrot of Australia under recent and future climates

Parameter Units Value Source
Mass g 33.7 (100) [36] (this study)
Core temperature °C 38–45 [36]
Body length mm 123 (138) this study
Body width mm 41 (45) this study
Body depth mm 42 (48) this study
Thermal conductivity of flesh W m−1 C−1 0.412 – 2.8 [39]
Flesh density kg m−3 1000 assumed
Percent of surface area that is ventral % 30 estimated
Percent of skin acting as free water surface % 0.05 – 10 estimated
Δ inhaled vs. exhaled air °C 5 (7.8) estimated (this study)
O2 extraction efficiency % 25–6 estimated
Configuration factor to sky % 50 assumed
Configuration factor to ground % 50 assumed
Emissivity % 99 assumed
Solar reflectivity of dorsal feathers % (24.8) (this study)
Solar reflectivity of ventral feathers % (35.1) (this study)
Solar transmissivity of feathers % 0 assumed
Feather element diameter dorsal μm 30.0 estimated
Feather element diameter ventral μm 30.0 estimated
Feather length dorsal mm 23.1 (26.4) this study
Feather length ventral mm 22.7 (25.5) this study
Feather depth dorsal mm 5.8 (6.6) this study
Feather depth ventral mm 5.6 (7.2) this study
Feather density dorsal cm−2 10,000 estimated
Feather density ventral cm−2 10,000 estimated
Faecal water % 60 [34]
Food protein per gram dry food g 0.12 [34]
Food lipid per gram dry food g 0.04 [34]
Food carbohydrate per gram dry food g 0.53 [34]
Food water content % 10, 25, 55 [34], this study
Digestive efficiency (of carbohydrate) % 90 [34]