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* Foster, Mercedes S. (2007): The potential of fruiting trees to enhance converted habitats for migrating birds in southern Mexico. Bird Conservation International17(1): 45-61. doi:10.1017/S0959270906000554PDF fulltext
Webster, Michael S. (1994). "Interspecific Brood Parasitism of Montezuma Oropendolas by Giant Cowbirds: Parasitism or Mutualism?". The Condor. 96 (3): 794–798. doi:10.2307/1369483. JSTOR1369483.
Webster, Michael S. (1994). "Interspecific Brood Parasitism of Montezuma Oropendolas by Giant Cowbirds: Parasitism or Mutualism?". The Condor. 96 (3): 794–798. doi:10.2307/1369483. JSTOR1369483.
Price, J. Jordan; Earnshaw, Sarah M.; Webster, Michael S. (2006-04-01). "Montezuma oropendolas modify a component of song constrained by body size during vocal contests". Animal Behaviour. 71 (4): 799–807. doi:10.1016/j.anbehav.2005.05.025. ISSN0003-3472. S2CID53179839.
Price, J. Jordan; Earnshaw, Sarah M.; Webster, Michael S. (2006-04-01). "Montezuma oropendolas modify a component of song constrained by body size during vocal contests". Animal Behaviour. 71 (4): 799–807. doi:10.1016/j.anbehav.2005.05.025. ISSN0003-3472. S2CID53179839.