Figure 4.

Shifting phenology due to artificial light at night does not have fitness consequences. (A) The difference in egg‐laying date between the light treatments and the control dark group (expressed as number of days) did not predict the number of hatchlings produced. Similarly, (B) the difference in egg‐laying date between the light treatments and the control dark group did not affect the number of fledglings produced. Each data point in the figure represents the residuals of a model containing the number of hatchlings or fledglings as response variable and the mean deviation in egg‐laying date per treatment per year as explanatory variable. Clutch size was also included in the model as a covariate. Lines and shaded areas represent model predictions ±95% confidence intervals.