Ramphastos toco toco - Toco Toucan

Graham, G. L., G. R. Graves, T. S. Schulenberg and J. P. O'neill. 1980. Auk: 97(2): 366-370.
Seventeen Bird Species New to Peru from the Pampas De Heath

Olson, S. L. 1983. Auk: 100(1): 126-133.
Evidence for a Polyphyletic Origin of the Piciformes

Avise, J. C. and C. F. Aquadro. 1987. Auk: 104(2): 324-328.
Malate Dehydrogenase Isozymes Provide a Phylogenetic Marker for the Piciformes (Woodpeckers and Allies)

Maria, J., C. D. Silva and D. C. Oren. 1990. Wilson Bulletin: 102(2): 309-313.
Introduced and Invading Birds in Belem, Brazil

Remsen, J. V., Jr., M. A. Hyde and A. Chapman. 1993. Condor: 95(1): 178-192.
The Diets of Neotropical Trogons, Motmots, Barbets and Toucans

Marini, M. A. and C. Melo. 1998. Condor: 100(2): 395-399.
Predators of Quail Eggs, and the Evidence of the Remains: Implications for Nestpredation Studies

Robbins, M. B., R. C. Faucett and N. H. Rice. 1999. Wilson Bulletin: 111(2): 216-228.
Avifauna of a Paraguayan Cerrado Locality: Parque Nacional Serrania San Luis, Depto. Concepcion