Fig. 4
From: The relationship between sternum variation and mode of locomotion in birds
Residuals from Fig. 3 plotted against simplified locomotory categories. The regression line, or zero on the y-axis, is indicated by the dotted grey line. Black lines indicate the median, boxes indicate the first and third quartiles, and whiskers and open circles indicate minimum and maximum values for each locomotory category. Silhouettes of birds that typically use this locomotory mode are included; silhouettes are not to scale. Silhouettes sourced from phylopic.org, credited to (from left to right): Phasianidae by Mattia Menchetti; Aluadidae uncredited; Corvus by Peileppe; Casuarius casuarius uncredited; Geococcyx by Patrick Fisher (vectorized by T. Michael Keesey); Buteo by Lauren Anderson; Aptenodytes by Steven Traver