Resumen

GOMEZ, Yudy Cristina; RIVERA DIAZ, Adelmo; GOMEZ, Jose Roberto  y  VARGAS, Nelcy Patricia. PRELIMINARY BIRD INVENTORY IN TWO FOREST FRAGMENTS OF THE COLOMBIAN EASTERN ANDEAN SLOPE.. rev.udcaactual.divulg.cient. [online]. 2008, vol.11, n.2, pp.109-119. ISSN 0123-4226.

The alteration in the Colombian forests is constantly increasing in areas where no registers of its biodiversity exist. When carrying out a preliminary ornithological inventory in two forest fragments in the south of the eastern Colombian Andes Mountains on the Florencia-Suaza road, on the limit of the Departments of Huila and Caquetá, the negative environmental impact made by mankind was evident. The avifauna of this study was registered by direct observation and net captures. 229 individuals, grouped into 73 species were registered; the families Thraupidae, Trochilidae and Tyrannidae were the most diverse ones. The ecological analysis, through the use of habitat and niche, showed that the majority of species were found in the primary forest, and regarding the kind of diet, the most abundant ones were the insectivores and frugivores of sot forest. The altitudinal distribution range of four species was increased: Heliodoxa schreibersii, Tangara xanthogastra, Xiphorhynchus erythropygius and Myiobius barbatus. The state of conservation of forests is good, but its constant fragmentation can cause the restriction and local migration of the fauna that depends on this ecosystem. The information presented here is the first inventory of avifauna done for this zone.

Palabras clave : avifauna; species; forest; conservation.

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