Suggested citation for the 2021 version of the Clements Checklist, including the October 2021 Updates and Corrections:
Clements, J. F., T. S. Schulenberg, M. J. Iliff, S. M. Billerman, T. A. Fredericks, J. A. Gerbracht, D. Lepage, B. L. Sullivan, and C. L. Wood. 2021. The eBird/Clements checklist of Birds of the World: v2021.
Downloaded from https://www.birds.cornell.edu/clementschecklist/introduction/updateindex/august-2021/2021-citation-checklist-download/
Three checklists are available. The first is the 2021 edition of the Clements Checklist (Clements Checklist v2021); the second is the 2021 edition of the eBird taxonomy (eBird v2021); and the third is the “master” or integrated checklist, which includes all entries in both the Clements Checklist and the eBird taxonomy.
eBird Taxonomy v2021 (1 MB Excel spreadsheet; 2 MB CSV File). Includes all categories that are reportable in eBird (including all taxa except subspecies from eBird/Clements Checklist) and is formatted with additional fields from eBird. Details of the eBird update will be posted soon on the eBird homepage.
eBird/Clements Checklist v2021 (4 MB Excel spreadsheet; 7 MB CSV File) Combines all taxa from the Clements Checklist and all additional categories from the eBird taxonomy, with brief range descriptions for all taxa.