Adrian H. Farmer Patrick J. Sousa 1983 A review and synthesis of existing information were used to develop models for breeding and wintering habitats for the wood duck (Aix sponsa). The models are scaled to produce indices of habitat suitability between 0 (unsuitable habitat) and 1 (optimally suitable habitat). Habitat suitability indices are designed for use with Habitat Evaluation Procedures previously developed by the U.S. Fish and Wildlife Service. application/pdf en U.S. Fish and Wildlife Service Habitat Suitability Index Models: Wood duck reports