Fig. 3: Integration of neck and hindlimb lengths in the duck breeds.

Log-log plot of hindlimb and neck length in the three duck breeds, with trendlines estimated via ordinary least-squares regression. The upper (solid) line and filled points correspond to the analysis where hindlimb length was measured as its total length (i.e. the sum of the femur, tibiotarsus, tarsometatarsus, and pes), whereas the lower (dashed) line and unfilled points correspond to the analysis where functional hindlimb length was used instead (i.e. the pes is not included). Statistical information is quoted in the main text.