-An annotated list of the birds found in a privately owned reserve in the subtropical zone on the eastern slope of Colombia's Central Andes is presented. The list is based on our own observations carried out in 1975-1976, and is amplified by discussion of hitherto unreported collections of birds taken nearby by M. A. Carriker, Jr., in the 1950s. Included are distributional, behavioral, and ecological notes on a number of poorly known species. Important range extensions are noted for four species: Hapalopsittaca amazonina, Anthocephala floriceps, Campylorhamphus pucheranii, and Atlapetes flaviceps. Colombia possesses one of the world's most diverse avifaunas. This is in large part due to the tremendous habitat diversity contained within its borders. Detailed ornithological studies of particular areas are, however, rare, and major recent works on Colombian birds (Meyer de Schauensee 1948-1952, 1964) are not organized so as to present a picture of local avian communities. Chapman (1917) did discuss overall bird distribution, but this was his sole focus; for lack of information he could say little about ecology and behavior, and much of his work is now nomenclaturally or taxonomically obsolete. Our study focuses on the birds of a small area in Moscopan, Department of Huila, Colombia. We report the species present, their abundance, microhabitat preferences and migratory status, and present new data on their ecology, behavior and distribution. Moscopan was first referred to in the ornithological literature by Meyer de Schauensee (1948) who characterized it as "2,000-2,900 m Huila. The name of a stream and of the general region of the upper Rio La Plata Valley, 32 km west of the town of La Plata, 2'20'N." The Rio La Plata is a tributary of the Magdalena River draining a portion of the eastern slope of the Central Cordillera of the Andes in the geographically complex region near the Magdalena's source. Previous ornithological studies in this region are virtually nonexistent: Lehmann (1957) did publish notes on a few species he collected in the area in the 1950s. Chapman's (1917) nearest locality was La Candela, situated in a different watershed to the south at 2,000 m. During the 1950s, M. A. Carriker, Jr., collected over 500 specimens at about 2,500 m in Moscopan, but almost none of this material has been reported on in the literature. Major holdings of these collections now reside in several U. S. museums (National Museum of Natural History, Field Museum of Natural History, Yale University's Peabody Museum of Zoology, Carnegie Museum, and Louisiana State University Museum of Zoology) and are discussed below in relation to our own