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♦ ¹FORAGING ECOLOGY OF PARROTS IN A MODIFIED LANDSCAPE: SEASONAL TRENDS AND INTRODUCED SPECIES, GREG D. MATUZAK, M. BERNADETTE BEZY, AND DONALD J. BRIGHTSMITH, The Wilson Journal of Ornithology 120(2):353–365, 2008
♦ ²NOTES ON THE DIET OF THE CRIMSON-COLLARED GROSBEAK (RHODOTHRAUPIS CELAENO) IN NORTHEASTERN MEXICO, Jack Clinton Eitniear & Alvaro Aragon Tapia, ORNITOLOGIA NEOTROPICAL 11: 363–364, 2000