Title
Density and natural history of Wattled Guan (Aburria aburri) in the Central Andes of Colombia
Author(s)
Rios, MM; Londono, GA; Munoz, MC
Published
2005
Publisher
Ornitología Neotropical
Abstract
Patterns of spatial distribution and population density of species depend on their intrinsic properties, interactions with other species, and availability and distribution of resources. Patterns of space use and population densities of Cracids, particularly montane species, are poorly documented. The Wattled Guan (Aburria aburri) is considered rare throughout its geographical distribution and is classified as near threatened. Between October 2002 and September 2003 we conducted monthly surveys along six transects, and made ad libitum observations to estimate population densities and obtain information on spatial distribution, breeding period and diet of the Wattled Guan. This study was carried out in a 489-ha forest in the central Andes of Colombia. We estimated a total density of 0.87 ind/km(2) and ecological density of 2.6 ind/km(2). We obtained few visual detections throughout the year and all of them took place in a particular area. Our results suggest an aggregated distribution in this guan. We did not observe fluctuations in abundance or evidence of altitudinal migration. Based on song patterns, we established a reproductive period between January and June, estimating the presence of two adult males in the study area. The available information suggests that the Wattled Guan has low population densities and that its habitat is dramatically reduced. These characteristics make this species extinction prone. It remains to be tested if this species is rare at larger scales and throughout its distribution range.
Keywords
POPULATION-DENSITY; FOREST; BIRDS; CONSERVATION; COMPETITION; CURASSOW; CRACIDAE; PATTERNS; AREA

Access Full Text

A full-text copy of this article may be available. Please email the WCS Library to request.



Back

PUB11021