西藏雅鲁藏布江中游河谷日喀则段黑颈鹤夜宿地调查
Roost sites of Black-necked Cranes(Grus nigricollis)wintering at Shigaze area in the Yarlung Zangbo valley of Tibet,China
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摘要: 日喀则地区是西藏自治区越冬黑颈鹤(Grus nigricollis)数量最多的地区。该文于2009年12月-2010年1月对日喀则地区雅鲁藏布江河谷的黑颈鹤夜宿地进行了调查,共发现有11处黑颈鹤夜宿地,夜宿的黑颈鹤数量为634只,多数位于河流缓慢并带有沙丘的岔流。早上09:15是黑颈鹤飞离夜宿地的高峰时间。白天黑颈鹤在农地上觅食秋季收获后遗留的谷物;夜晚,错综的河道为黑颈鹤躲避天敌提供了安全的夜宿场所。Abstract: Shigaze has the highest number of wintering Black-necked Cranes (Grus nigricollis) in Tibet. A roost site survey of Black-necked Cranes wintering at Shigaze area in the Yarlung Zangbo valley was undertaken from December 2009 to January 2010. A total of 11 roost sites were recorded, with 634 Black-necked Cranes. Most Black-necked Cranes left their roost sites at 09:15 in the morning. Side channels with shallow and slow moving waters in the valley were selected, often with sand bars. While Black-necked Cranes mainly forage in farmlands during day time, these small side river channels provide safe roosting places for the cranes.