 In order to be able to carry larger vertebrate prey, it has evolved disproportionately large feet.The legs and toes are a brownish-yellow with black talons.Females are 17.4 to 19 centimetres (6.8 to 7.5 inches) long, and males are generally smaller, measuring 15.2 to 17 centimetres (6 to 6.7 inches) in length.