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Robert S Ridgely

Robert S. Ridgely is a world-renowned ornithologist at the Academy of Natural Sciences and the author of Birds of Panama and Birds of South America. Paul J. Greenfield has been studying and painting the birds while residing in Ecuador for 28 years. Frank B. Gill is Senior Vice President of Science for the National Audubon Society, former President of the American Ornithologists' Union, and the author of Ornithology.

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