As an important migration stopover and breeding site for migratory waterbirds flyway in Asia-Pacific, the Xingkai Lake in southeast Heilongjiang (Fig. 1) is the important wetland for the conservation of Red-crowned Crane (Grus japonensis). From 2012 to 2014, using the methods of point and the transect sampling, we investigated the population number of the Red-crowned Crane at the Xingkai Lake National Natural Reserve in the migration season (spring and autumn) and breeding season (summer). The numbers of Red-crowned Crane were stable during migration seasons in these 3 years, with 51﹣84 cranes in springs and 178﹣213 cranes in autumns; however, the breeding numbers dropped from 105 cranes in 2012 to 83 cranes in 2014 (Table 1). The autumn number of Red-crowned Crane from local breeding population increased, with 15 cranes and 9 cranes in 2013 and 2014, respectively.