Introduction:

The Apolinar’s Wren Cisthotorus apolinari is an endemic species of the Eastern Andes of Colombia currently classified as Critically Endangered (CR) at the national level and Endangered (EN) worldwide, mainly due to the degradation of wetlands, their primary habitat, and the parasitism of the nests.

Objetive:

Evaluate the state of the populations of C. apolinari in seven wetlands of the Sabana de Bogotá, searching to define what the areas evaluated mean that it hosts the largest population of the species and what other factors determine these population sizes.

Methods

Between July and December 2014 in seven wetlands we monitoring carried out using counting points and auditory censuses, the abundance of the Apolinar’s Wren was recorded, the vegetation cover where the individuals were recorded and the abundances of Shiny Cowbird Molothrus bonariensis.

Results:

There were 63.6 h of observation and 88 counting points, obtain a nine records of C. apolinari , one individual in Tibanica, three in La Florida and five in Gualí, mainly associated with the reed Schoenoplectus californicus. None of the biotic and abiotic factors evaluated in the wetlands, were found to determine the presence of the Apolinar’s Wren, but trends were present for some variables as the presence of S. californicus and Thypa spp.

Conclusions:

The population of C. apolinari has had a significant reduction of up to 94 %, added to a possible local extinction in the wetland of La Conejera. These results seek to provide relevant information to contribute to the formulation of effective conservation measures for the protection of the species and its habitat throughout its distribution in the country.