Figure 5.
Trade-off between foraging and contrafreeloading (CFL) for developmentally advantaged (ADV) and disadvantaged (DIS) starlings. Linear regression lines are shown for ADV (red) and DIS (black) birds; data points are means per bird over the four trials. Dashed lines show mean trial food consumption or contrafreeloading duration for ADV (red) and DIS (black) birds.