Abstract:During September 2017 to August 2018, species diversity and community structure of birds in Guizi Hill were investigated using the line transect method and the point count method. A total of 48 species of birds were recorded, belonging to 24 families and 6 orders. The dominant species were azure-winged magpie (Cyanopica cyanus) and Chinese blackbird (Turdus mandarinus). There were 24 species of resident birds, 10 species of summer migratory birds, 5 species of winter migratory birds and 9 species of transient migratory birds, accounting for 50.00%, 20.83%, 10.42% and 18.75%, respectively. Among artificial building area, arbor forest, mixed forest, and grassland, the species diversity index of birds in the mixed forest was higher than the others. Compared to the periods of 1953-1965 and 1966-1990, bird species were significantly reduced to 40.74% and 43.53% separately, and the dominant species have been changed from Passer montanus and Hirundo rustica to C. cyanus and T. mandarinus. These results suggest that urban birds have changed greatly under the condition of city expansion and population growth. Bird conservation should be concerned in ecological-based city planning and construction.