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[9]Marini, M.A., Melo, C. 1998. Predators of Quail Eggs, and the Evidence of the Remains: Implications for Nest Predation Studies. The Condor 100: 395-399

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[14]Pizo, M.A., Donatti, C.I., Guedes, N.M.R., Galetti, M. 2008. Conservation puzzle: Endangered hyacinth macaw depends on its nest predator for reproduction. Biol Conserv 141: 792-796

[15]Ragusa-Netto, J. 2006. Abundance and Frugivory of the Toco Toucan (Ramphastos toco) in a Gallergy Forest in Brazil’s Southern Pantanal. Braz. J. Biol 66: 133-142

[16]Ragusa-Netto, J. 2002. Fruiting Phenology and Consumption by Birds in Ficus calyptroceras (MIQ.) MIQ. (Moraceae). Braz. J. Biol 62: 339-346

[17]Remsen Jr, J.V., Hyde, M.A., Chapman, A. 1993. The Diets of Neotropical Trogons, Motmots, Barbets and Toucans. The Condor 95: 178-192

[18]Rettig, N. 1978. Breeding behavior of the Harpy Eagle (Harpia harpyja). Auk 95: 629-643. (life)

[19]Ricklefs, R.E., Konarzewski, M., Daan, S. 1995. The Relationship between Basal Metabolic Rate and Daily Energy Expenditure in Birds and Mammals. Am. Nat 147: 1047-1071

[20]Rotenberg, J.A., Marlin, J.A., Pop, L., Garcia, W. 2012. First Record of Harpy Eagle (Harpia Harpyja) Nest in Belize. Wilson J Ornitho 124: 292-297

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[22]Sibly, R.M., Witt, C.C., Wright, N.A., Venditti, C., Jetz, W., Brown, J.H. 2012. Energetics, Lifestyle and Reproduction in Birds. PNAS 109: 10937-10941

[23]Short, L. L., and J. F. M. Horne. 2001. Toucans, barbets, and honeyguides; Ramphastidae, Capitonidae, and Indicatoridae. Oxford University Press, Oxford, United Kingdom

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[26]Vincent, M.E. 2007. The Preliminary Studies of Wild Toco Toucans (Ramphastos toco) a Keeper’s Experience in the Field. 1-27

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