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Additional References

• Chapman, C. A., L. J. Chapman, and L. Lefebvre (1989). Variability in parrot flock size: possible functions of communal roosts. Condor 91:842–847.
• Hall, L. A. (1988). Habitat variables which influence the dissemination and colonization of introduced psittacines in southern California. M.S. thesis, San Diego State University, San Diego, CA, USA.
• Kirwan, G. M., A. Levesque, M. Oberle, and C. J. Sharpe (2019). Birds of the West Indies. Lynx Edicions, Barcelona, Spain.
• Ríos-Muñoz, C. A., and A. G. Navarro-Sigüenza (2009). Efectos del cambio de uso de suelo en la disponibilidad hipotética de hábitat para los psitácidos de México. Ornitología Neotropical 20(4):491–509. https://www.academia.edu/2455229/Efectos_del_cambio_de_uso_de_suelo_en_la_disponibilidad_hipotetica_de_habitat_para_los_psitacidos_de_Mexico
• Waugh, D. R. (2015). Después de 20 años hay buenas noticias de las amazonas de Tamaulipas en México. Atualidades Ornitológicas 183:14–15.