CHAPTER XX - ATLAS OF COLONIES OF INLAND-BREEDING SEABIRDS IN CALIFORNIA

Project Description :: Mapping Approach :: Species Range Maps :: Species Tables

INTERACTIVE MAPS Northern Region | Central Region | Southern Region

PROJECT DESCRIPTION

This digital atlas is an integral portion of the report "Inland-breeding seabirds in California: A catalogue with conservation recommendations" (see the citation for the atlas and the report provided below). Both the report and the interactive atlas maps found here are also available on the PRBO website. The overall project was designed to document the current status and highlight the conservation needs in California of a group of seven species of colonial or semicolonial waterbirds, which for lack of a better term are here considered inland-breeding seabirds. These species are the American White Pelican, Double-crested Cormorant, Ring-billed Gull, California Gull, Caspian Tern, Forster's Tern, and Black Tern. Although the majority of survey work was conducted from 1997 to 1999, the atlas maps show the locations of colonies of the two species of gulls active from 1994 to 2000 and those of the other five species active from 1997 to 2000. The atlas maps do not show the location of the many colonies known to be active either prior to or since these periods. The methods of surveys, species accounts, historical data on colonies, and conservation recommendations are included in the full report. Before using the maps, at a minimum please read the material in the Mapping Approach section for an explanation of the approach and constraints to mapping.

Colony sites were mapped on 1:100,000 scale USGS topographic quads. Interactive maps were created for three general regions within California - Northern, Central, and Southern (see map) - using the HTML ImageMapper 3.0 extension for ArcView 3.x. To access the interactive map for each region, click on the appropriate link to the left and then on the "Navigation Instructions" link in the top left corner of the map page, which describes how to zoom in on a colony site and to retrieve information about that colony.

Species Tables include data on numbers of each species by colony or region during the survey period. Species Range Maps show the statewide distribution and relative abundance of inland colonies. Acknowledgments contains a list of contributors and funders.

Download inland-breeding seabird colonies shapefile (UTM, NAD83):
Zone 10 or Zone 11

For more information, contact:
Dave Shuford , PRBO Conservation Science, 4990 Shoreline Highway, Stinson Beach, CA 94970; email: dshuford@prbo.org

Suggested Citations
When referencing text or data on colony numbers, please cite the entire report:

Shuford, W. D. 2004. Inland-breeding seabirds in California: A catalogue with conservation recommendations. Final report of PRBO Conservation Science to Division of Migratory Bird and Habitat Programs, U.S. Fish and Wildlife Service, Region 1, 911 NE 11th Ave., Portland, OR 97232.

When referencing colony locations and maps, please cite the atlas chapter of the report:

Shuford, W. D., Rintoul, C., Stralberg, D., and Toniolo, V. 2004. Atlas of colonies of inland-breeding seabirds in California, in Inland-breeding seabirds in California: A catalogue with conservation recommendations (W. D. Shuford, author/editor), Chapter XX (CD-ROM). Final report of PRBO Conservation Science to Division of Migratory Bird and Habitat Programs, U.S. Fish and Wildlife Service, Region 1, 911 NE 11th Ave., Portland, OR 97232.