The middle toe (excluding talon) can range 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 largest in accipitrids) measuring from 24.1 to 33.6 mm (.95 to 1.32 in) in length. In the regular scientific strategy of measuring wing dimensions, the wing chord is 325.1-444.5 mm (12.80-17.50 in) long.