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1. Aquatic Community Classification Project: Pennsylvania

2004. Aquatic Community Classification Project, prepared by the Western Pennsylvania Conservancy.

2. Aquatic Mollusk sampling points Plummers Island: Pennsylvania

2004. Ryan Evans, Pennsylvania Natural Heritage Program - Pittsburgh office. April 2004 freshwater snail sampling points around Plummer's Island, Montgomery County, Maryland.

3. Bioblitz zones for Erie Bluffs State Park: Pennsylvania

2004. Ephraim Zimmerman, Western Pennsylvania Conservancy. This shapefile is representative of the five zones which Erie Bluffs State Park was split into for the Bioblitzes (24 hour inventory of all living ...

4. Breeding Bird Atlas 2 - Grid: Pennsylvania

2004. This Website provides an interface for PA Breeding Bird Atlas staff and volunteers to find survey blocks, enter their findings and view results. I ...

5. Breeding Bird Atlas 2 - Regions: Pennsylvania

2004. This Website provides an interface for PA Breeding Bird Atlas staff and volunteers to find survey blocks, enter their findings and view results. I ...

6. Breeding Bird Atlas 2 - Survey Points: Pennsylvania

2004. This Website provides an interface for PA Breeding Bird Atlas staff and volunteers to find survey blocks, enter their findings and view results. I ...

7. Easements: Pennsylvania

2004. Western Pennsylvania Conservancy. Point locations of conservation easements held by Western Pennsylvania Conservancy.

8. Ecoregions United States (Bailey)

2004. USDA Forest Service. This map layer is commonly called Bailey's ecoregions and shows ecosystems of regional extent in the United States, Puerto Rico, and the U.S. Virgi...

9. Historic projects: Pennsylvania

2004. Western Pennsylvania Conservancy. Point locations representing Western Pennsylvania Conservancy's projects that have resulted in the transfer of land to another party.

10. Properties: Western Pennsylvania

2004. Western Pennsylvania Conservancy. This layer contains polygons of Western Pennsylvania Conservancy's presently-owned properties.