【摘要】 位于蒙古高原南端的包头地区，由于地形地貌及气候的影响，形成特有的植被群落和生态类型，山岳地带植被存在着垂直方向和阴阳坡地的差异．包头地区鸟类有１６９种，并讨论了垂直分布特征．更多还原

【Abstract】 Special vegetation communities and ecological varieties are formed owing to the infleunce of the landforms and the climate in the Baotou area that lies to the southern end of the Mongolian Plateau.The mountainous vegetation differs in vertical direction and in sunny and dark hillside fields.The article reports that there are 169 kinds of birds in this area,and talks about their vertical distribution.更多还原