Vertical Distribution of Birds in Chang Bai Shan

Chang Bai Shan is one of the famous mountains in our country.It is situated at 127°56′-128°6′E and 41°58′-42°6′N.The climate and topograph of the region under consideration are very complex.This paper presents the result of my surveys on the vertical distribution of birds in this area during 1962-1966 and 1974-1975.