Figure 3From: Reproductive responses of birds to experimental food supplementation: a meta-analysisEffects of food caching and food accessibility on variation in clutch size. Effect of (a) food caching and (b) the level of accessibility to the feed on variation in clutch size in response to food supplementation in birds. Mean effect sizes (Hedges d) and 95% confidence intervals are presented, with sample size (number of experiments) above bars.Back to article page