We studied habitat use by the avian community during dry and rainy seasons, at La Iguana Experimental Station, a region of well-drained savannahs on the Eastern Llanos, in Venezuela. After three years of field work, we obtained a list of 173 bird species for this area. We carried on surveys by using the Point Count technique, in 86 observation spots, distributed within three habitats: low-lands, forests and wooded savannahs. We quantified the relative abundance of 126 species in these three habitats through both rainy and dry seasons. The low-lands and the forests harbor 97.6 % of the total bird population; however, they cover less than one-fourth of the total study area. The species richness showed seasonal variations in the three habitats, reaching maximum values in low-lands and savannas. Richness increases during the rains in the low-lands, while in forests and savannahs it increases during the dry season. We found evidence of population movements between habitats. The largest movement was observed between savannahs and low lands. We detected important interactions among bird communities of the three habitats; these three habitats have a large effect in the diversity of birds. Implications of these results for management of the areas in this ecosystem are discussed ; Estudiamos la utilización que hace la comunidad de aves de los principales hábitats, en la Estación Experimental La Iguana, en una región de sabanas bien drenadas de los Llanos Orientales de Venezuela. Elaboramos un listado de 173 especies en toda el área de estudio luego de tres años de observaciones. Realizamos censos desde 86 puntos de observación, distribuidos en tres hábitats: bajos, bosques y sabanas arboladas, con los cual cuantificamos la abundancia relativa de 126 especies tanto en la temporada de lluvias como durante la sequía. Los bajos y bosques contienen el 97,6% de la avifauna total, a pesar de que cubren menos de la cuarta parte del área. La riqueza de especies presentó variaciones estacionales en los tres hábitats, siendo máximas ...