论文部分内容阅读
黑颈鹤 Grus nigricollis 是我国特有的大型珍贵高原涉禽。为加强联合保护,更好地发展和利用这一宝贵资源,我们于1984年1月对在贵州省威宁县草海越冬的黑颈鹤数量进行了调查。冬季的草海杂草疏矮,四周多为裸露的荒山环绕,视野开阔,而且黑颈鹤分布集中,与灰鹤容鉴易别,这为黑颈鹤数量调查提供了方便。经过踏察,我们把黑颈鹤集中分布的地方划分为五个区,每区设立一观察点(见示意图),每个观察点二人(一人计数,一人观察)调查时,五个观察点用步话机相互联系,定时用望远镜观察计数,每次计数三遍。(转封三
Black-necked crane Grus nigricollis is China’s unique large precious plateau wading birds. In order to strengthen joint protection and to better develop and utilize this valuable resource, we conducted a survey in January 1984 on the numbers of black-necked cranes overwintered in the grassy sea of Weining County, Guizhou Province. Winter grass weeds dwarf, surrounded by bare mountain surrounded by more than a broad vision, and the distribution of black-necked cranes, gray crane and easy identification, which provides a convenient survey for the number of black-necked cranes. After the inspection, we divided the black-necked cranes into five areas, each with an observation point (see diagram), two observation points (one person counting, one observation), and five observation points Use walkie-talkie to connect with each other, observe the counting regularly with the telescope, count three times each time. (Re-sealed three