This means that we have finalized our taxonomic treatment across 165 families with 13 more being worked on currently (March, May, and June milestones).
These 178 families cover 5585 species-level taxa that have been finalized, or just over half (50.4%) of the species list for the world. By July 2022, we plan to have tackled a couple of very speciose families, including Thraupidae, which should push us closer to 55%.
These taxonomic assessments are the core part of the WGAC-Taxonomic Group’s work and have included representatives from the IOC World Bird List, BirdLife Taxonomic Working Group, eBird/Clements team, AOS-NACC, AOS-SACC, former members of the Howard and Moore team, and other authorities.
eBird/Clements and IOC have begun adopting WGAC decisions with upcoming revisions of those taxonomies in order to facilitate the full transitioning to WGAC soon after the first public release. BirdLife also plans to adopt many of these decisions, but must move more slowly because of integration with the IUCN Red List and their Data Zone. The proposal and supplement publication process for AOS-NACC has been highly aligned with WGAC, with proposals for most North American WGAC issues being put before the AOS-NACC and upcoming proposals for North American taxa currently being prepared; see for example Trochilidae, Accipitridae, Tytonidae, and Strigidae in this set of proposals, most of which were outgrowths of the WGAC process:
2022 Proposals - American Ornithological Society