Methodology
March 1, 2025
Following the approach developed by Gregory and van Strien (2010), State of the
Birds reports focus on composite summaries of population change for collections of
species that share common primary habitat or taxonomic affinity. In this report, we
provide composite indexes for habitat-obligate species as defined in earlier reports
(Grassland, Aridland, Eastern Forest and Western Forest), for several taxonomic-based
groups (Shorebirds, Waterbirds, Geese and Swans, Sea Ducks, and Dabbling/Diving
Duck species), and for species on our Tipping Point list with adequate data. Lists of
species included in each habitat-obligate group are presented as supplemental material
at StateoftheBirds.org.
Citation Information
| Publication Year | 2025 |
|---|---|
| Title | Methodology |
| Authors | A. Rodewald, Mike Brasher, John D. Alexander, Elisabeth M. Ammon, Tracy E. Borneman, Dustin Brewer, Stephen C. Brown, Jennie N. Duberstein, Beth Flint, Adam Hannuksela, Kathleen Holland, Jeffrey A. Hostetler, Edwin Juarez, Robin Kaler, Chris Latimer, Elva Manquera, Kate Martin, Chris McCreedy, Nicole L. Michel, Corina Newsome, Andrew Olsen, Marc D. Romano, Kenneth V. Rosenberg, B. Ryder, Rebekah J. Rylander, John R. Sauer, Adam Smith, Dena R. Spatz, Caleb S. Spiegel, Tice Supplee, Roberta Swift, Eric A. Vanderwerf, Josh L. Vest, Olivia Wang |
| Publication Type | Report |
| Publication Subtype | Organization Series |
| Index ID | 70264970 |
| Record Source | USGS Publications Warehouse |
| USGS Organization | Eastern Ecological Science Center |