Speed scaling of kinematic and kinetic variables in birds.

The relationships identified between each variable and speed is of one of three forms: y = Ax + B (linear), y = AxB (power I) or y = AxB + C (power II). The relationship may also be modulated by mass, as indicated by the numbers in brackets. For each relationship, the r2 values are reported, as well as the K statistic of Blomberg et al. [91] and associated P-value for both coefficients A and B. Values in italics are statistically significant.