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 Alexander, Elisabeth M. Ammon, Tracy Borneman, Dustin Brewer, Stephen Brown, Jennie N. Duberstein, Beth Flint, Adam Hannuksela, Kathleen Holland, Jeffrey Hostetler, Edwin Juarez, Robin Kaler, Chris Latimer, Elva Manquera, Kate Martin, Chris McCreedy, Nicole Michel, Corina Newsome, Andrew Olsen, Marc Romano, Kenneth Rosenberg, B. Ryder, Rebekah Rylander, John Sauer, Adam Smith, Dena Spatz, Caleb Spiegel, Tice Supplee, Roberta Swift, Eric VanderWerf, Josh Vest, Olivia Wang |
| Publication Type | Report |
| Publication Subtype | Organization Series |
| Index ID | 70264970 |
| Record Source | USGS Publications Warehouse |
| USGS Organization | Eastern Ecological Science Center |