del Hoyo, J., A.A. Weller, G. M. Kirwan, N. Collar, and P. F. D. Boesman (2021). Sapphire-spangled Emerald (Chionomesa lactea), version 1.1. In Birds of the World (S. M. Billerman, B. K. Keeney, P. G. Rodewald, and T. S. Schulenberg, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.saseme1.01.1 retrieved September 21, 2022