The population changes of 4 common resident species including Cyanopica cyana, Turdus merula mandarinus (blackbird), sparrow, Pycnonotus sinensis (Chinese Bulbul) had been investigated on 5 sample belts from 2005 to 2007 in Guixi Mountainous area to analyze the impact of the campus ecological environment on the birds. The result revealed that 4 species of birds' densities showed the trend of rising. The different habitat types of the sample belts made bird population distribution different, all of...