The toucans of Mexico
1987
Birds
Catálogo de las aves de Cuba
1975
Garrido, Orlando H. |
Garcia Mantaña, Florentino |
Aves de ambientes acuáticos de Córdoba y centro de Argentina
1980
Nores, Manuel |
Yzurieta, Dario |
Introducción a las aves de Colombia
1979
Lopez, Humberto Alvarez |
The Galapagos hawk : an eco-geographical study with special reference to its systematic position
1973
Vries, Tjitte de |
The Galapagos finches (Geospizinae : a study in variation
1945
Lack, David |
Aves migratorias en Colombia
1959
Olivares, Antonio |
Aves de Chile
1984
Daskam, Thomas |
Rottmann, Jürgen |
Effects of the Sespe Creek Project on the California condor : administrative report
1969
Sibley, Fred C. |
Hawks aloft : the story of Hawk Mountain
1960
Broun, Maurice |