The golden eagle (Aquila chrysaetos) is aptly named for its golden- brown plumage, with head and nape feathers a slightly lighter, gold colour. It is the national symbol of Mexico and a protected national treasure in the United States. It is the most widely distributed species of eagle. Although not as easily recognisable as its bald-headed cousin, the golden eagle is equally magnificent. They live in mountainous areas, canyon lands, riverside cliffs and bluffs and anywhere the rugged terrain creates frequent updrafts. They typically avoid developed areas and large stretches of forest. Golden eagles are territorial. A mated pair can maintain a territory as large as 60 square miles. Males weigh-in at about 3.5kg but females are heavier at about 5kg. Adult golden eagles are predominantly dark brown with paler feathers around the back of the head – giving the species its name. Juvenile golden eagles are a richer chocolate brown with conspicuous white wing and tail patches.