De La Ossa V, J. and De La Ossa-Lacayo, A. 2011. Aspects of the population density and natural history of Milvago chimachima (AVES: Falconidae) in the urban area of Sincelejo (Sucre, Colombia). Universitas Scientiarum. 16, 1 (Jan. 2011), 63–69. DOI:https://doi.org/10.11144/javeriana.SC16-1.aotp.