Contents
When Black Plus White Equals Gray: the Nature of Variation In the Variable Seedeater Complex (emberizinae: Sporophila)
F. Gary Stiles
Breeding of Agriornis Murina (aves: Tyrannidae) in Patagonia, with Comments on Its Habitat Preferences and Taxonomic Position
Allison V. Andors and Francois Vuilleumier
Short Communications
Nest Site Records of the Yucatan Great Horned Owl in Sian Kaan, Mexico
Paula L. Rocha and J. Luis Rangel-Salazar
Nidadas Supernormales En Cotorra Comun Myiopsitta Monachus Monachus (aves: Psittacidae)
Rosana M. Aramburu
Aspectos De La Distribucion Y Biologia Reproductiva De Asio Clamator En La Provincia De Buenos Aires, Argentina
Mariano M. Martinez, Juan P. Isacch, and Fernando Donatti
Reactions of Birds to Nestling Predation by a Snake
Juan Carlos Matheus, Ulrike Wittmann, Olaf Jahn, Marlies Leutfeld, and Karl-L. Schuchmann
Notes on the Distribution, Body Mass, Foods and Vocal Mimicry of the Gray Seedeater (sporophila Intermedia)
Betsy Trent Thomas
Identificacion Individual En El Cisne De Cuello Negro (cygnus Melancoryphus) a Traves De La Linea Ocular
Maria Susana Seijas
A Road Survey of Raptors Through Western Mexico
Manuel Marin and John Schmitt
Densidad Y Dinamica Espacio-temporal De Las Poblaciones De Ciguenas (ciconiidae) En Los Llanos Inundables De Venezuela
Jose A. Gonzalez
The Juvenal Plumage of Muscisaxicola Albifrons
R. Terry Chesser
Short Communications
Nest Site Records of the Yucatan Great Horned Owl in Sian Kaan, Mexico
Paula L. Rocha and J. Luis Rangel-Salazar
Nidadas Supernormales En Cotorra Comun Myiopsitta Monachus Monachus (aves: Psittacidae)
Rosana M. Aramburu
Aspectos De La Distribucion Y Biologia Reproductiva De Asio Clamator En La Provincia De Buenos Aires, Argentina
Mariano M. Martinez, Juan P. Isacch, and Fernando Donatti
Reactions of Birds to Nestling Predation by a Snake
Juan Carlos Matheus, Ulrike Wittmann, Olaf Jahn, Marlies Leutfeld, and Karl-L. Schuchmann
Notes on the Distribution, Body Mass, Foods and Vocal Mimicry of the Gray Seedeater (sporophila Intermedia)
Betsy Trent Thomas
Identificacion Individual En El Cisne De Cuello Negro (cygnus Melancoryphus) a Traves De La Linea Ocular
Maria Susana Seijas
A Road Survey of Raptors Through Western Mexico
Manuel Marin and John Schmitt
Densidad Y Dinamica Espacio-temporal De Las Poblaciones De Ciguenas (ciconiidae) En Los Llanos Inundables De Venezuela
Jose A. Gonzalez
The Juvenal Plumage of Muscisaxicola Albifrons
R. Terry Chesser