A new subspecies of Common Bush-Tanager (Chlorospingus flavopectus, Emberizidae) from the east slope of the Andes of Colombia: Nueva subespecie de montero común (Chlorospingus flavopectus, Emberizidae) de la vertiente oriental de los Andes de Colombia

Jorge Enrique Avendaño; F. Gary Stiles; Carlos Daniel Cadena

doi:10.59517/oc.e313

Authors

Jorge Enrique Avendaño Laboratorio de Biología Evolutiva de Vertebrados, Departamento de Ciencias Biológicas, Universidad de los Andes, Bogotá, Colombia. Programa de Biología y Museo de Historia Natural, Universidad de los Llanos, Sede Barcelona, Villavicencio, Colombia.
F. Gary Stiles Instituto de Ciencias Naturales, Universidad Nacional de Colombia,
Carlos Daniel Cadena Laboratorio de Biología Evolutiva de Vertebrados, Departamento de Ciencias Biológicas, Universidad de los Andes, A.A.

DOI:

https://doi.org/10.59517/oc.e313

Keywords:

Andes, Chlorospingus flavopectus, Chlorospingus ophthalmicus, cloud forest, Emberizidae, geographic variation, oscine vocalizations, taxonomy

Abstract

We describe Chlorospingus flavopectus olsoni, subsp. nov. from the east slope of the Eastern Andes of Colombia. Specimens from the range of the new subspecies have been traditionally referred to C. f. macarenae, a subspecies endemic to the Serranía de la Macarena. However, C. f. olsoni differs from C. f. macarenae in plumage, iris coloration, and morphometrics. The new subspecies is more similar in plumage and vocal characters to subspecies exitelus and nigriceps from the Central and Eastern Andes. Ecological niche modeling suggests that C. f. olsoni is potentially restricted to a small belt of cloud forest south of the Sierra Nevada del Cocuy to the depression known as Las Cruces Pass in the department of Huila. The species C. flavopectus is not threatened, but the accelerated deforestation of cloud forests in Colombia and the uncertainty about species limits in the complex call attention to the importance of preserving the remaining patches of this highly species-rich ecosystem.

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