The studies on the birds in western Nghe An as well as shouthwestern Nghe An have been carried out for a long time by numerous authors, mainly in national parks and nature reserve such as Pu Mat, Pu Huong, and Pu Hoat. However, these studies have been conducted for a long time and need to be updated. During the study period in Pu Xai Lai Leng area (Ky Son district) and Pu Mat National Park, 18 species of birds were recorded in addition to this area, including 8 additional species for Pu Xai Lai Leng area and 10 species for Pu Mat National Park.