The bird collection (52 species and subspecies) treated in this paper was collected in the upper Cusiana River, eastern slope of the Eastern Andes, Departamento de Boyaca, Colombia. In the introduction are given geographical details of the proper area where the material was secured. This study is very important because of the little knowledge on the ornis of the Eastern Andes in Boyaca. Some light is thrown on the similarities and discrepancies between the avifaunas of Boyaca and Cundinamarca (Eastern Andes) and also on the relations with the adjacent regions of Venezuela. The intergradation of Atlapetes semirufus zimmeri with A. s. semirufus is discussed and the subspecies Hemispingus frontalis flavidorsalis is added to the colombian avifauna. Previous local avifaunas of the Andes in Boyaca are: Borrero and Olivares (1955) and Olivares (1963).