U.S. Fish & Wildlife ServiceThis layer provides locations of Ridgways' rail call count stations at Don Edwards San Francisco Bay NWR. This information is to be used by U.S. Fish and Wildlife Service staff and approved partners only. The locations shown are highly sensitive habitat and closed to the public for those reasons. This file is not editable. Contact sfbaynwrc@fws.gov for more information. For more information see the project's Site-specific Protocol for Monitoring Marsh BirdsArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/7a773ea9a54e4c03b91d41a3e0a13419_0engU.S. Fish and Wildlife Service Open DataPublicDon Edwards San Francisco Bay NWR Rail Call Count Stations [United States]Web servicesUnited StatesLast Modified: 2026-01-08