Hip arthroscopy. Hip arthroscopy refers to the viewing of the interior of the acetabulofemoral (hip) joint through an arthroscope and the treatment of hip pathology through a minimally invasive approach.
The golden eagle is a very large, dark brown raptor with broad wings, ranging from 66 to 102 cm (26 to 40 in) in length and from 1.8 to 2.34 m (5 ft 11 in to 7 ft 8 in) in wingspan. This species' wingspan is the fifth largest amongst extant eagle species. In the largest race (A. c. daphanea) males and females weigh typically 4.05 kg (8.9 lb) and 6.35 kg (14.0 lb). In the smallest subspecies, A. c. japonica, males weigh 2.5 kg (5.5 lb) and females 3.25 kg (7.2 lb).
Eagles skeletons weigh about half a pound (250 to 300 grams), and is only 5 to 6 percent of its total weight. The feathers weigh twice as much. Eagle bones are light, because they are hollow. The beak, talons, and feathers are made of keratin.