Robert S. Ridgely is president of Rainforest Trust. He is the renowned coauthor of The Birds of Ecuador, also from Cornell, and author of The Birds of South America, Field Guide to the Songbirds of South America, and A Guide to the Birds of Panama.
John A. Gwynne is former Chief Creative Officer/V.P. for Design Emeritus, Wildlife Conservation Society. He is an artist of books including A Guide to the Birds of Panama and Birds of Venezuela.
Guy Tudor is the Neotropics' most acclaimed bird artist, a MacArthur fellow, and principal illustrator of The Birds of South America, Field Guide to the Songbirds of South America, Birds of Venezuela, and A Guide to the Birds of Colombia.
Martha Argel is a widely known Brazilian ornithologist and author of multiple books on science.
Ridgely, Gwynne, Tudor, and Argel are coauthors of Wildlife Conservation Society Birds of Brazil: The Pantanal and Cerrado of Central Brazil.