Left patch use (mean proportion of seeds taken from the left patch) by nutmeg mannikins in (a) flocks AB (n = 9) and (b) CD (n = 10), under left : right resource ratios 1 : 2 and 2 : 1. Left patch use (mean proportion of seeds taken from the left patch) by nutmeg mannikins in (a) flocks AB (n = 9) and (b) CD (n = 10), under left : right resource ratios 1 : 2 and 2 : 1. The grey dashed line shows mean values for the whole flock for each food distribution. Julie Morand-Ferron et al. Proc. R. Soc. B 2011;278:1223-1230 This Journal is © 2010 The Royal Society