Abstract: Bird diversity is an important biomonitoring indicator of wetland ecosystems. To capture the winter bird resources of Baiyangdian Lake, a survey of Baiyangdian Lake was conducted from December 2021 to February 2022 using the sample line method, the results showed that: 1)81 species of birds were recorded, belonging to 34 families of 16 orders, including 18 species of winter birds, 35 species of resident birds, 21 species of migratory birds and 7 species of summer birds; 2)2 dominant species, 8 common species, 19 rare species and 52 seldon found species; 3)3 species of birds under national-level one key protection and 13 species of birds under national-level two key protection; 4)the highest number of bird species in December and the highest number of birds in January, the highest Shannon-Wiener index in December and the lowest in January, the highest Pielou index in December and the lowest in January. The results of the study showed that Baiyangdian Lake is rich in winter bird resources, with a large number of rare and endangered birds, and is a wintering site for many species of birds of national importance, so protection and supervision of Baiyangdian Lake should be strengthened.

Key words: Baiyangdian Lake, winter, bird species, diversity