Busi, A., Cardona-Salazar, L.J., Castillo, D.G., Ossa-López, P.A., Rivera-Páez, F.A., Vásquez, R.A. and Castaño-Villa, G.J. 2020. Morphological differences in a population of Rufous-collared Sparrow (Zonotrichia capensis, Statius Müller, 1776) (Passerine, Emberizidae) at different elevations in the Tropical Andes. Biota Neotropica. 20, 2 (Jan. 2020).