San Francisco Bay's dwindling salt marshes have been deeply affected by over a century of human activity. Current efforts by PRBO biologists are providing authorities with the information necessary to conserve the populations of songbirds that call the Bay Area marshes home. Marsh Journal By Yvonne Chan. A field biologist working in the San Francisco Bay marshes reports back from the pickleweed. At California's largest nesting area for Bald Eagles, the level of water in the lake is crucial.
Biologists continue research there on the eagle's life cycle.
Time-travel back to the Pleistocene and catch a glimpse of the diversity of birds that once roamed California's skies. N otes PRBO's departments report on recent research activities. Observer is published quarterly by PRBO's Board of Directors . The printed version is edited and designed by Claire Peaslee . Designed for the web by Mike Lynes and Grant Ballard .