Abstract: With the rapid urbanization process,the campuses as parts of public green spaces have become the important habitats for birds.Since different arrangements of tree species have significant impacts on bird communities,it is necessary to do research on it.Over the past three years,an observation on the diversity of birds and different arrangements of tree species have been made,showing the total number of bird species is 19,among which,there are 5 resident bird species,12 summer migratory bird species and 2 winter migratory bird species.Among all these birds species,there are 6 phytophagous bird species,6 insectivorous bird species,2 raptorial bird species and 5 omnivorous bird species.Their inhabit tree species are as follows:Populus alba,Salix xaureo-pendula,Salix babylonica,Pinus tabulaeformis,Sabina chinensis,Picea meyeri.The resident birds are not linked with the tree species,but migrant birds are.The complex perspective of tree species,the plants diversity,the density,the types of fruits and canopies of different tree species have strong influences on bird species composition,but life forms of the tress don't.In order to improve the diversity of bird species on campus and guarantee the balances of eco-system of man-made green space system,we should strengthen the above aspects of ornamental tree arrangements.

Key words: Campus greening, the arrangement of ornamental tree species, birds, diversity