Table S2.

Relationships between environmental and life history variables

Life history variables	Environmental variables		N species
	Predictability	Quality
Siblings y/n	−33.07 to −2.56	−4.24 to 23.28	60
Brood size	−0.76 to 0.47	−0.28 to 0.59
Siblings y/n	−19.37 to −9.42	−2.18 to 9.03	51
Brood size	−0.72 to 0.56	−0.31 to 0.52
No. future broods possible	−0.02 to 0.02	−0.01 to 0.01
Siblings y/n	−33.19 to −13.06	−3.69 to 8.12	49
Brood size	−0.89 to 0.41	−0.30 to 0.53
No. future broods possible	−0.02 to 0.02	−0.01 to 0.01
Full vs. half siblings likelihood	−5.50 to 2.81	−3.54 to 2.22
Siblings y/n	−61.65 to −5.45	−6.66 to 25.08	33
Brood size	−0.91 to 0.74	−0.64 to 0.43
No. future broods possible	−0.03 to 0.03	−0.01 to 0.01
Full vs. half siblings likelihood	−9.01 to 37.59	−80.76 to 7.21
Promiscuity	−0.03 to 0.03	−0.01 to 0.01

Table reports the 95% CI for the relationship of environmental variables on each of the life history variables used with each subset of the overall dataset (n = 60 species corresponds to models 1 and 2; n = 51 species corresponds to models 3 and 4; n = 49 species corresponds to models 5 and 6; n = 33 species corresponds to models 8 and 7). Results are from MCMCglmm models, controlling for phylogeny. MCMCglmm was used instead of ASReml because ASReml models did not converge properly when accounting for phylogenetic variance in some models with smaller sample sizes. Cells in bold indicate the relationship is significant (the 95% CI does not include 0).