Fig. 4
From: Sex-specific signalling of individual personality by a mutual plumage ornament in a passerine
Sex-dependent relationship between activity (i.e. residual activity) and bib size in free-living tree sparrows (Passer montanus). Lines and shaded areas are model-predicted logistic regression lines ± 95% confidence intervals. Filled circles and blue solid line indicate males, while empty circles and red dashed line indicate females