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Fig. 8. Correlations between hovering flight wingbeat frequency and mass-specific
metabolic rate residuals obtained from (A) the body mass regression
(r2=0.46, F1,16=14.25,
P=0.0015) and (B) from independent contrasts for gradual (filled
circles, r2=0.47, F1,9=8.73,
P=0.0144) and speciational (open circles,
r2=0.70, F1,9=23.73,
P=0.0007) models of character evolution. Symbols in A as in
Fig. 3.