Golden Eagle

The golden eagle is the most widely distributed eagle and lives across the Northern Hemisphere. Adults are dark brown with lighter golden-brown plumage on the nape, and immature birds usually show white on the tail and often on the wings. Males average about 3.6kg and females about 5.1kg, and the largest subspecies reaches 4.05kg and 6.35kg (Wikipedia, general species account).

It uses agility and speed with powerful feet and large, sharp talons to hunt a variety of prey, mainly hares, rabbits, marmots and other ground squirrels. It builds large nests on cliffs and other high places and may return for several breeding years. Females lay up to four eggs and incubate them for six weeks, and typically one or two young survive to fledge in about three months. The sources read give nothing specific to Bhutan.