Bird resource of Guangzhou was surveyed in four sampling region along fixed line transects from April,2005 to December,2006.Totally,251 bird species were recorded belonging to 54 families and 18 orders.It took up 18.86% of the bird species recorded in China.Of which,22 birds are listed as grade Ⅱ key state-protected species,and one as grade Ⅰ key state-protected species.One hundred and twenty three birds are residents,88 are winter visitors,37 are summer visitors,38 are passage migrants and 8 are vagrant visitors.Among four sampling regions,forestry region has the highest bird species(164)with a highest Shannon-Wiener index(3.395),while wetland region has the lowest species(105)and Shannon-Wiener index(2.407).City region has 116 bird species and Shannon-Wiener index is 3.008.Farmland and scrub region has 147 birds and Shannon-Wiener index is 3.250.The species richness is highest in March(130)and lease in June(99),and 102 and 126 in September and December respectively.Shannon-Wiener index is lowest(2.424)in December,and similar(3.550-3.650)among other months.Hence,we concluded that:(1)Guangzhou has high richness in bird species.The bird list of Guangzhou could be over 300 species combining the expert knowledge and other information resource.(2)Systematic survey in a large scale is important for the understanding of biodiversity in a region.However,it is so rare at present.This situation it should be considered.(3)The difference of bird diversity among four regions and seasons shows that birds had affected by urbanization in Guangzhou.(4)Guangzhou is one of important regions for migrant birds in China.