Collar, N., A. Bonan, P. F. D. Boesman, and E. de Juana (2020). Plain Parakeet (Brotogeris tirica), version 1.0. In Birds of the World (J. del Hoyo, A. Elliott, J. Sargatal, D. A. Christie, and E. de Juana, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.plapar1.01 retrieved February 22, 2023