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Fig. 5. Canonical variate analysis (CVA) of skeletal morphology in birds. Function
1 against function 2 for walking species (squares, N=10);
non-specialists (circles, N=66); diving birds (triangles,
N=24). Functions 1 and 2 were primarily functions of relative
uncinate length and width and rib length, respectively. Solid black squares
represent significantly different group centroids. Letters highlight
borderline species of respective groups: the fulmar (
), the green
woodpecker (ß) and the swallow (µ).