Introduction to the Black-necked Crane: The Black-necked Crane is the rarest species among the 15 existing crane species in the world, with less than 10,000 remaining in the world. It is also the only species among all cranes that uses plateau as its main habitat. The Serinco Black-necked Crane National Nature Reserve is the main breeding ground for black-necked cranes in the world. In addition to black-necked cranes, there are also a large number of rare waterfowl such as brown-headed gulls, band-headed geese, and red shelducks within the reserve.