Villegas-Retana, S. A., and D. Araya-H. “Consumption of Terminalia Catappa Fruits and Use of Leaves As Tools by the Bird Ara Ambiguus (Psittaciformes: Psittacidae) in Costa Rica”. UNED Research Journal, vol. 9, no. 2, Sept. 2017, doi:10.22458/urj.v9i2.1894.