关键词: 昭觉县, 鸟类, 多样性, 季节变化, 生境分布, 垂直分布

Abstract: In January, May, August and October of 2020, a field survey of bird diversity in Zhaojue County was conducted by using the fixed transect line method. A total of 107 species of birds from 38 families, 11 orders were recorded in Zhaojue County. There are 69 species of Oriental origin, 28 species of Palearctic origin and 10 species are widespread. The birds include 76 residential species, 24 summer visitor species, 3 winter visitor species and 4 passage migrants. There are 6 Class-2 nationally protected birds distributed in this region. Four species belong to CITES appendix Ⅱ and four species are endemic to China. Based on the result of seasonal analysis, it was found that the bird species richness was the highest in summer, the abundance of bird species was the highest in autumn, and species richness and abundance were the lowest in winter. There were obvious dominant species in each season and the dominant species in summer is the most similar to autumn. Among the 9 habitats in this region, birds in the coniferous forest had the highest species diversity, and birds in the bush had the most abundance. There were dominant species in all habitats except for coniferous forest. Coniferous forest and evergreen broad-leaved forest have the highest similarity of birds. The elevational pattern of species richness indicate that the peak of bird species richness and abundance appeared at the elevations of 2 100-2 400 m, and the minimum species richness appeared at the elevations of 3 300-3 600 m. The species at 2 100-2 400 m are most similar to those at 2 400-2 700 m. This study firstly reports on the bird resources in Zhaojue County and provides primary bird diversity data for the Liangshan Mountains, which will be helpful for the protection of bird diversity in this area.

Key words: Zhaojue, bird, diversity, seasonal variation, habitat distribution, elevational distribution