Fig. 1.
Four types of nests of Black-necked Cranes: A, grass mound nest in grassy swamp; B, natural island nest in lake; C, floating grass nest in lake and D, dirt mound nest in lake.
Four types of nests of Black-necked Cranes: A, grass mound nest in grassy swamp; B, natural island nest in lake; C, floating grass nest in lake and D, dirt mound nest in lake.