Fig. 2
From: Repeatability of signalling traits in the avian dawn chorus
Dawn song start time in relation to minimum night temperature. Lighter dots show the start times before the egg laying stage and darker dots during the egg laying stage. Regression lines and 95% CI (shaded area) are based on fitted model values. The maximum dawn song start time was 2793 s and the minimum 77 s before sunrise (Mean +/− SD: 1923 +/− 684). Start time in seconds before sunrise was inverted and log-transformed