Figure 3. The relationships between beak length and depth for 17 male and 21 female Huia.

Arrows indicate where measurements were made. Sex was determined using molecular methods. Blue circles represent males, red triangles indicate females, and black triangles represent the four DNA-sexed females that fall within the beak length range of males. Another DNA-sexed female, which was labelled ‘juvenile’, is indicated by a white triangle. Possible growth curves for males and females are shown by the black lines.