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Abbreviations and Map Key
- Texas A&M University Press
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5 Abbreviations NAWMP North American Waterfowl Management Plan NWR National Wildlife Refuge ppt parts per thousand TPWD Texas Parks and Wildlife Department USDA US Department of Agriculture USFWS US Fish and Wildlife Service USGS US Geological Survey Map Key Year-round distribution Winter distribution Summer distribution Migration Irregular occurrence Extent of irregular range Used in the case of Texas Bird Record Committee Review Species, one dot signifies a single occurrence. introduction [44.222.175.73] Project MUSE (2024-03-28 08:56 GMT) Species Accounts 8 Black-bellied Whistling-Duck (adult). Photograph by Raymond S. Matlack, December 24, 2005, Brazos Bend State Park, Fort Bend County, Texas. ...