CHAPTER 3 - DIGITAL ATLAS OF COLONIES OF SEVEN SPECIES OF INLAND-BREEDING WATERBIRDS IN CALIFORNIA
This digital atlas is an integral portion of the report "Inland-breeding pelicans, cormorants, gulls, and terns in California: A catalogue, digital atlas, and conservation tool" (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. These species are the American White Pelican, Double-crested Cormorant, Ring-billed Gull, California Gull, Caspian Tern, Black Tern, and Forster’s 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.
Shuford, W. D. 2010. Inland-breeding pelicans, cormorants, gulls, and terns in California: A catalogue, digital atlas, and conservation tool. Wildlife Branch, Nongame Wildlife Program Report 2010-01. California Department of Fish and Game, Sacramento.
When referencing colony locations and maps, please cite the digital atlas CD-ROM of the catalogue as:
Shuford, W. D., C. Rintoul, D. Stralberg, and V. Toniolo. 2010. Digital atlas of colonies of seven species of inland-breeding waterbirds
in California, CD-ROM (Chapter 3) in Inland-breeding pelicans, cormorants, gulls, and terns in California: A catalogue, digital
atlas, and conservation tool (W. D. Shuford, author/editor). Wildlife Branch, Nongame Wildlife Program Report 2010-01.
California Department of Fish and Game, Sacramento.