The middle toe (excluding talon) can variety from 38.3 to 53.8 mm (1.51 to 2.12 in), with the hallux-claw (the talon of the rear toe, which has evolved to be the most significant in accipitrids) measuring from 24.1 to 33.6 mm (.95 to 1.32 in) in size. In the normal scientific strategy of measuring wing measurement, the wing chord is 325.1-444.5 mm (12.80-17.50 in) prolonged.