Fig. 3From: The relationship between defecation and feeding in nestling birds: observational and experimental evidenceIn the laboratory experiments, the percentage of fecal sacs defecated during feeding (black portion of bar). Nests 6–8 each contained 2-day old nestlings; nests 9–11 each contained 6-day old nestlings. Numbers above bars represent the total number of defecations by that nest in that treatmentBack to article page