【摘要】 黑颈鹤为我国特产珍稀动物,作者于1975和1978至1984年间,对它的越冬生态进行了观察。观察得知,黑颈鹤每年10月中、下旬迁来草海,翌年8月中下旬离去,越冬期为5个月左右。越冬期,有3种不同的集群形式,即家族群、同种集群和混种集群。主要食物为植物。黑颈鹤在草海越冬的数量,已由1975年的35只,增加到1984年的305只。黑颈鹤除在草海越冬外,还发现于威宁东南的普安县,是迄今所知在我国分布最南和最东的纪录。更多还原

【Abstract】 Observations were made on the overwintering ecology of black-necked cranes at Caohai, Weining County, Northwestern Guizhou Province in 1975 and 1978-1984. The results obtained are as follows;1. During the second and last ten days of October every year, flocks of black-necked cranes travel thousands kilometres to Caohai for overwintering. In the mid March, black-necked cranes begin to leave their overwintering area.The cranes stay in Caohai for nearly 140-160 days.2. The black-necked cranes are gregarious in three forms at the overwintering area, that is family group, consrecific group and multispecific group.3. The black-necked cranes are herbivorous and especially feed on Scirpus yagara stem.4. The population density of black-necked cranes in the overwintering area of Caohai has 35 birds in 1975, 305 birds in 1984. The rate of increasing population is eight times.5. The black-necked cranes are found not only in Caohai, but also in Puan County, which is the utmost part of east and south in the Chinese distribution of black-necked cranes.更多还原