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Gosler, A. (1991). The Neotropic Region. Pp 94-139. Photographic Guide to Birds of the World. Mallard Press: New York, NY. USA. North American Regional Studbook by studbook keeper, Nanette Bragin; Published by the Phoenix Zoo. Perrins, C. M., Middleton, A.L.A. 1989. Woodpeckers, pp. 296-303, The Encyclopedia of Birds. Equinox Ltd. New York, USA Short, L.L., and J.F.M. Horne. 2002. Family Indicatoridae (Honeyguides), pp. 274-295 in del Hoyo, J., Elliott, A., Sargatal, J., eds., Handbook of the Birds of the World. Vol. 7. Lynx Edicions, Barcelona, Spain. Short, L.L. & Horne J. F. M. (2002). Family Ramphastidae (Toucans). Pp 220-272 in: del Hoyo, J., Elliot, A.& Sargatal, J. eds. (2002). Handbook of the Birds of the World. Vol 7. Jacamars to Woodpeckers. Lynx Edicions: Barcelona, Spain. Terres, J.K., 1980. Piciformes, pp.727-728, The Audubon Society Encyclopedia of North American Birds. Alfred A. Knopf, Inc. Winkler, H. and Christie, D. 1995. Woodpeckers: An Identification Guide to the Woodpeckers of the World. Houghton Mifflin Co. New York, USA
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