Fig. 2From: Sand lizard (Lacerta agilis) phenology in a warming worldRelationship between egg-laying day and female mass. Plot of the egg-laying day (Julian days since 1 January) of individual sand lizard (Lacerta agilis) females versus their respective mass after laying (g). The observations are grouped into year of measurement. The figure does not comprise all individual data points, but includes the highest and lowest number of days recorded in each year (parameter estimate −1.275 ± 0.104, P < 0.0001, n = 356)Back to article page