0 5 10 15 Proportion of each sex (%) 35 40 45 50 55 ↑ culmen_length_mm FEMALE MALE sex 14 16 18 20 14 16 18 20 14 16 18 20 culmen_depth_mm → 8 8 7 7 7 6 6 6 5 5 5 5 5 4 4 3 3 3 3 3 3 2 2 2 2 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 11 10 9 8 6 6 5 5 4 4 3 3 3 3 3 3 3 3 3 3 3 3 3 2 2 2 2 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1