Fig. 1
From: The role of climate factors in geographic variation in body mass and wing length in a passerine bird
Sexual size dimorphism in wing length and body mass in Passer montanus. a Mean male and female wing length (mean ± SE, the asterisk represents a statistically significant difference between the sexes). b Relationship between wing length and body mass (males: df = 151, t = 3.856, p < 0.001, open circles and dashed lines; females: df = 112, t = 4.459, p < 0.001, black dots and solid lines)