JEB -- Ward et al. 204 (19): 3311 Figure IG2

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Fig. 2. Metabolic power (P_met) of two starlings during wind tunnel flight carrying a respirometry mask measured from the rates of oxygen consumption and carbon dioxide production [bird 15, , solid line P_met=(2.03±12.6)V^–1+(0.0013±0.0005)V³+(10.10±1.87); bird 19, ${triangleup}$ , broken line P_met=(59.0±27.7)V^–1+(0.0020±0.0006)V³+(4.07±3.42)] (means ± S.E.M., N=24 for bird 15 and 21 for bird 19), where V is flight speed.