Smith, P., & RĂ­os, S. D. (2017). Novel plumage aberrations in Paraguayan non-Passerine Birds, and the definition of a new plumage aberration unique to Psittacidae. Biodiversity and Natural History, 3(1), 24-28. Retrieved from http://www.biodiversnathist.com/index.php/bnh/article/view/38