Fig. 3

The effect of age on timing of breeding. The effect of age (calendar year) on timing of breeding (hatching day-of-year) shown as a quadratic line (for all other variables set at their average values) in the white-throated dipper population in Lyngdalselva 1978–2015. Grey dots correspond to observed hatching dates per age, with ages jittered in order to increase visibility of the full dataset