Short, L.L. and A. Bonan (2020). Crimson-rumped Toucanet (Aulacorhynchus haematopygus), 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.crrtou1.01 retrieved December 20, 2022