Effect size	k	Meta‐analytic mean ± SE [95% CI]	I 2 total (%)	I 2 study (%)	I 2 species (%)	I 2 obser. (%)	Q test	Egger's test Est. ± SE [95% CI]
lnCVR	382	−0.02 ± 0.04 [−0.09, 0.05]	92.41	12.78	<0.001	79.63	4102	0.02 ± 0.01 [0.004, 0.04]
Mammals	110	0.02 ± 0.11 [−21, 0.24]	81.96	35.54	<0.001	46.25	666	0.001 ± 0.04 [−0.08, 0.10]
Birds	141	0.003 ± 0.11 [−0.21, 0.21]	87.59	9.72	32.41	45.46	980	0.03 ± 0.01 [0.01, 0.05]
Turtles	23	−0.24 ± 0.15 [−0.55, 0.07]	89.27	<0.001	<0.001	89.27	170	1.94 ± 0.84 [0.20, 3.69]
Squamates	108	−0.02 ± 0.06 [−0.15, 0.10]	96.12	1.56	<0.001	94.56	2243	0.01 ± 0.02 [−0.03, 0.05]