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).