Table 2.

Effects of life-history variables on mtDNA substitution rate in passerines (n = 88) vs. other bird species (n = 108) without (A) and with phylogenetic control (B).

	Passerines				Non-passerines
Model	slope	R2	p1	p2	slope	R2	p1	p2
(A) Without Phylogenetic control
Body mass	0.22	0.11	<0.01		-0.17	0.12	<0.01
Maximum longevity	0.48	0.15	<0.01		-0.41	0.09	<0.01
Body mass + Maximum longevity		0.17	0.14	0.02		0.13	0.01	0.13
(B) With Phylogenetic control
Body mass	0.22	0.12	<0.01		-0.11	0.05	0.02
Maximum longevity	0.4	0.11	<0.01		-0.28	0.05	0.03
Body mass + Maximum longevity		0.16	0.04	0.05		0.06	0.17	0.22