You searched for: Author Patuxent Wildlife Research Center Remove constraint Author: Patuxent Wildlife Research Center Subject Environment Remove constraint Subject: Environment Subject Biology and Ecology Remove constraint Subject: Biology and Ecology Place Massachusetts Remove constraint Place: Massachusetts Place Delaware Remove constraint Place: Delaware
1966. Patuxent Wildlife Research Center. This line shapefile portrays the current routes used for conducting Breeding Bird Surveys in the lower 48 States. This layer is part of the 1997-20... National Atlas of the United States.