Silva-Piña, M.J. et al. 2018. Habitat characteristics of Spotted Owl roosting sites (Strix occidentalis lucida) in the Sierra Madre Occidental, Mexico. Huitzil Revista Mexicana de Ornitologí­a. 19, 2 (Mar. 2018). DOI:https://doi.org/10.28947/hrmo.2018.19.2.319.