Table 1.

Linear mixed model explaining the variation in the levels of faecal corticosterone metabolites (ng g⁻¹ dry weight) in the raven population.

fixed effects	estimate	s.e.	p
model corticosterone ∼ sociality × sex
intercept	39.296	3.167	<0.00001
sociality pair	−11.710	2.676	<0.00001
sex male	−0.356	0.944	0.707
sociality pair : sex male	15.256	1.740	<0.00001