Table 2. The effect of environmental treatment, handfeeding, size and sibling competition on a chick’s begging posture.

MCMCglmm logistic regression, N = 29 nests, 54 adults, 199 chicks, 1121 feeding visits. The Bonferroni corrected cut-off for significance was 0.007, and significant terms are in bold.

Fixed effects	Estimate	95% CI	pMCMC
Mass (g)	-0.02	-0.25 to 0.24	0.93
Weight rank (smallest or not smallest chick)	0.01	-0.60 to 0.58	0.98
Natal nest supplemented with food	0.07	-0.41 to 0.56	078
Foster nest supplemented with food	0.05	-0.43 to 0.53	0.85
Handfed to satiation before filming	0.91	0.61 to 1.28	<0.001***
Mean begging intensity of nestmates	0.31	0.23 to 0.38	<0.001***
Random effects
Natal Nest	0.26	0.08 to 0.49
Foster Nest	0.23	0.07 to 0.44
Parent ID	0.11	0.04 to 0.17
Chick ID	1.23	0.93 to 1.58