Table 1. Results from a generalised least squares regression on curvature against body mass.

Curvature	Data set	Slope (±CI)	Intercept (±CI)	p-value
Inner	All	−11.5 (2.1)	89.6 (2.6)	<0.001*
	Bird Only	−10.7 (2.2)	91.1 (2.7)	<0.001*
Outer	All	−5.8 (1.9)	99.8 (2.1)	<0.001*
	Bird Only	−7.5 (2.0)	99.4 (2.3)	<0.001*

^*denotes a significant p-value (<0.05).