Table 4. Calculated variance in slopes and intercepts of regressions between body mass and our 13 skeletal measurements, for 18 avian orders.

	FC	FD	FL	HC	HD	HL	TaC	TaD	TaL	TiL	HAF	CSW	CLL
Y-Intercept Variance	1	0.4	2.4	1.51	0.78	1.43	0.59	0.22	7.12	1.9	0.14	0.5	1.05
Slope Variance	0.17	0.14	0.17	0.36	0.18	0.08	0.15	0.15	0.65	0.11	0.06	0.17	0.09