Fig. 3

Alpha diversity before and after the cross-fostering experiment. The boxplots show the median as a thick line within boxes of the 25th and 75th percentiles, with whiskers for the minimum and maximum, and outliers as separate points. P-values within the plots are for the test of whether control and cross-foster offspring differed from one another. The sample sizes are 36 control and 27 cross-foster nestlings in 20 nests in the Before Cross-Fostering plot (A) and there are 25 control and 19 cross-foster nestlings in 16 nests in the After Cross-Fostering plot (B)