黑龙江省三江平原丹顶鹤的数量分布

在地面调查的基础上,我们使用Y-11轻型飞机对黑龙江省三江平原地区的丹顶鹤的数量分布近行了调查,调查时飞行高度80米,航速140公里/小时,续航里程共3748公里。调查结果表明,丹顶鹤在三江平原主要分布在8个地区,其中嘟噜河下游、洪河自然保护区、七星河流域和兴凯湖低地是主要繁殖地,总数量共309只。

THE NUMERICAL DISTRIBUTION OF THE RED-CROWNED CRANE IN SANJIANG PLAIN AREA OF HEILONGJIANG PROVINCE

The red-crowned crane (Grus japonensis) is one of the migratory bird species in the Sanjiang Plain Area of Heilongjiang Province. The cranes return to the breeding ground in pairs or in family groups in early March, and they migrate to south China for wintering in late September or early October. Thus the cranes are on the breeding ground for about six or seven months.With respect to the numerical distribution of red-crowned cranes in the Sanjiang Plain Area, we have carried out an aerial survey from the 3rd to the 20th of May, 1984. We use a light aircraft of Y-11 type. The survey flight altitude is 80 m and the air speed 140 km/hi The total aerial transects cover 3748 km in distance, and the flight paths are shown in figure 1.The numbers (309 in total) and the distributional range of red-crowned cranes in the Sanjiang Plain Area are listed in the tab; 1 and fig. 2. The lower reaches of Duluhe River, Honghe Natural Reserve, Qixinghe River basin and Xingkai Lake lowland are the main breeding grounds of red-crowned cranes in the Sanjiang Plain Area.