Figure 1From: Parental food provisioning is related to nestling stress response in wild great tit nestlings: implications for the development of personalityGrey shaded bars representing the original chicks and the white bars the cross-fostered chicks reared in the same nest. With (a) representing the spider biomass on day four, (b) the spider biomass on day eight, (c) the caterpillar biomass on day four and (d) the caterpillar biomass on day eight.Back to article page