
A research & study finished in 1987 shows that there are more than 1900 species and subspecies of birds (both resident and migrants), and most as 689 of them occurring in the mountain range of southwestern China, 417 in southern Yunnan, and only 78 in Qiangtang high Plateau (Tibet).
As it varies in province, the richest in species number is Yunnan as 802 species, and 2nd is Sichuan as 628 species of birds, 3rd Guizhou as 417 species of birds.
The distribution area for breeding species and subspecies as follow (area name and location area, species, % in China):
Northeastern China
Daxing Anling Mountain range: 215 11.38%
Changbaishan mountain range: 242 12.81%
Northern China
Yellow River & Huaihe plain: 149 7.89%
Huangtu (Yellow Earth) Plaetau: 230 12.18%
Xinjiang & Inner Mongolia
Eastern Grassland: 167 8.84%
Western Desert: 278 14.72%
Tianshan Range 229 12.12%
Qingzang Plaetau
Qiangtang Plaetau: 78 4.13%
Qinghai and Southern Tibet: 331, 17.52%
Southwestern China
Mountain Range: 689 36.47%
Southern Yunnan: 417 22.06%
Central China
Eastern plain and hills: 241 12.76%
Western mountain range and plateau: 329 17.42%
Southern China
Coastal area of Fujian and Guangdong: 251 13.29%
Taiwan: 166 8.79%
(Above distribution from Outlines of China Birds Distribution by Peng Yanzhang etc)