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A Guide to the Birds of Panama: With Costa Rica, Nicaragua, and Honduras

by Robert S. Ridgely,John A. Gwynne

ISBN 13: 9780691025124

Format: Paperback (656 pages)
Publisher: Princeton University Press
Published: 15 Jun 1992

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The Birds of Ecuador: v. 2 (Helm Field Guides)

by Robert S. Ridgely,Paul J. Greenfield,Paul J. Greenfield

ISBN 13: 9780713661170

Format: Paperback (748 pages)
Publisher: Helm
Published: 31 Jul 2001

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The Birds of Ecuador: Status, Distribution, and Taxonomy / Field Guide Vols I & II: Two-Volume Set

by Robert S. Ridgely,Paul J. Greenfield,Frank B. Gill

ISBN 13: 9780801487224

Format: Paperback (1648 pages)
Publisher: Cornell University Press
Published: 30 May 2001

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Wildlife Conservation Society Birds of Brazil: The Atlantic Forest of Southeast Brazil, including São Paulo and Rio de Janeiro: VOLUME 2 (WCS Birds of Brazil Field Guides)

by Robert S. Ridgely,John A. Gwynne,Guy Tudor,Martha Argel

ISBN 13: 9781501704536

Format: Illustrated (432 pages)
Publisher: Comstock Publishing Associates
Published: 14 Jun 2016

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