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Ontogenetic trends in chukar wing performance at in vivo Reynolds numbers: (A) coefficient of lift (CL) versus angle of attack (α); (B) coefficient of drag (CD) versus α; (C) CL versus CD; and (D) CL/CD versus α. In vivo angles of attack (α) are indicated by shaded areas; maximum L:D ratios are indicated by squares (in C). Pigeon wing (4 Hz) (Usherwood, 2009) is included in C for comparison. d.p.h.: days post hatching.
