Fig. 2.

Maximal longevity in years in relation to principal components 1 and 2 (PC1: P = 0.009; PC2: P = 0.020). PC1 was positively loaded with species body mass and oxygen consumption and thus is referred to as “species size”. PC2 was positively loaded with RBC mitochondrial superoxide production and negatively with RBC mitochondrial cardiolipin content and thus is referred to as “RBC mitochondrial attributes”. Linear regression line and 95 % confidence interval are reported on each panel. Species codes reported in the panels correspond to ACCGEN: Accipiter gentilis, ACCNIS: Accipiter nisus, BUTBUT: Buteo buteo, ANAPLA: Anas platyrhynchos, COLLIV: Columba livia, FALSUB: Falco subbuteo, FALTIN: Falco tinnunculus, COLVIR: Colinus virginianus, ALERUF: Alectoris rufa, COTJAP: Coturnix japonica, PERPER: Perdix perdix, CORCOR: Corvus corone, FRICOE: Fringilla coelebs, HIRRUS: Hirundo rustica, PARMAJ: Parus major, PASDOM: Passer domesticus, PASMON: P. montanus, SITEUR: Sitta europaea, STUVUL: Sturnus vulgaris, TURMER: Turdus merula, ASIOTU: Asio otus