Appendix S1 - Illegal and Legal Parrot Trade Shows a Long-Term, Cross-Cultural Preference for the Most Attractive Species Increasing Their Risk of Extinction

Raw data used for statistical analyses and their sources. Number of poached parrots seized in Mexico and USA [18]; number of parrots legally traded before and after 1992 (www.cites.org); number of years the capture of the species was legally allowed, overlap between the distribution of species and human populations in Mexico, and accessibility of nests [12]; prices (in $) in Mexico and USA [18]; conservation status in 2013 ([19], www.iucnredlist.org); beauty scores and size (in cm) of species [12], and their ability to mimic human speech [22]. (DOC)