The fauna of Ladakh has much in common with that of Central Asia in general and that of the Tibetan Plateau in particular.Exceptions to this are the birds, many of which migrate from the warmer parts of India to spend the summer in Ladakh. For such an arid area, Ladakh has a great diversity of birds — a total of 225 species have been recorded. Many species of finches, robins, redstarts (like the black redstart), and the hoopoe are common in summer. The brown-headed gull is seen in summer on the river Indus and on some lakes of the Changthang. Resident water-birds include the brahminy duck also known as the ruddy sheldrake and the bar-headed goose. The black-necked crane, a rare species found scattered in the Tibetan plateau, is also found in parts of Ladakh. Other birds include the raven, Eurasian magpie, red-billed chough, Tibetan snowcock, and chukar. The lammergeier and the golden eagle are common raptors here specially in Changthang region.