Table 1. Mean and standard deviation of claw sizes (outer arc lengths) of D-I, II, and III relative to D-IV, and D-II relative to D-III.

		D-I/D-IV		D-II/D-IV		D-III/D-IV		D-II/D-III
	n	mean	σ	mean	σ	mean	σ	mean	σ
Accipitridae	15	1.803	0.266	1.653	0.154	1.196	0.074	1.387	0.162
Falconidae	4	1.273	0.120	1.127	0.083	1.105	0.012	1.019	0.070
Pandionidae	1	0.951	-	0.899	-	0.922	-	0.975	-
Strigiformes	9	1.045	0.060	1.191	0.044	1.158	0.055	1.030	0.051
Non-raptors	8	1.308	0.439	1.084	0.076	1.286	0.091	0.847	0.082
perching birds	6	1.455	0.398	1.081	0.086	1.294	0.089	0.840	0.094
ground birds	2	0.867	0.192	1.093	0.053	1.263	0.130	0.867	0.047

n = number of individuals, σ = standard deviation. For specimens where both feet were measured, the average of those measurements are used here.