Fig. 1. Allometry of resting (_O2rest) and maximum (_O2max) rate of oxygen consumption of 12 Australian pelicans during post-hatching growth (filled circles), excluding one adult bird (open circle). Regression equations: _O2rest=0.0149M^1.01 (r²=0.98); _O2max=0.0040M^1.28 (r²=0.99). Data from 33 species of adult birds during flight (open triangles) are from Norberg (1996), converting W to ml min^–1 assuming 20 J ml^–1, and averaging multiple data from the same species; _O2max=0.641M^0.80 (r²=0.86). Data from nine species of adult birds exposed to cold (filled triangles) are from Hinds et al. (1993); _O2max=0.787M^0.62 (r²=0.99). Dotted lines are extrapolations.