Table 1.

Differences in foraging behaviour between blue tits and great tits, and between two treatments (cross-fostered and control). (Interaction term is included only when significant. Statistics are given as F-values for foraging height (factorial ANOVA), and χ²-values for foraging in twigs (logistic regression). ^*p<0.05, ^**p<0.01, ^***p<0.001.)

			factor
dependent variable	season	n	species	treatment	interaction
foraging height	autumn	180	0.02	4.81*	28.61***
spring	101	12.07***	8.58**	6.29*
foraging in twigs	autumn	180	0.00	8.48**	16.47**
spring	101	16.32***	18.54***	—