Abstract: This paper reported the results of avian survey in mangrove wetland of Qinglangang. Fifty two species of birds were recorded , belonging to 19 families , nine orders. Of them , 23 species were migratory birds , 29 resident birds ; 31 were waterbirds and 21 terrestrial birds. Three species were listed as national second-class protected birds , 17 species listed in the Sino-Japan Migratory Birds Protection Agreement , 18 species lised in Sino-Australia Migratory Birds Protection Agreement . Number of birds varied with seasons. The number of bird species as a whole and waterbird species were the most in winter and the least in summer. The annual trend of species number was exhibited in this order : winter > autumn > spring > summer. Migratory birds affected the annual fluctuation of bird species. The composition and number of birds varied with food condition and area of habitats. This paper also discussed the status of avian diversity in Qinglangang Reserve.