[Posted by Chuck Almdale]

As many birders know, the checklists of the world’s birds are merging and the overall master list (One List To Rule Them All!) is called Avilist. This officially happened this month, November 2025, ta da! Birds of the World (BOW) had a 90-minute seminar about it on 13 November, 2025, and it’s now on line. You might as well grab a beer (herbal tea) and bowl of popcorn (infused kale & sprouts sandwich) and watch it. Otherwise you won’t know what happened to your checklist on eBird or anywhere else.

According to the BOW announcement page:

Description: Every year, the world’s taxonomic authorities propose a newly restructured avian taxonomy. Soon after the taxonomic changes are settled, our taxonomy team and editors get busy revising accounts so that the Birds of the World website reflects the new taxonomy. Concepts are intermediate to advanced. The 2025 taxonomy updates were available in Birds of the World, eBird, Merlin, and Macaulay Library in November, 2025.

Concepts are intermediate to advanced.
1. Intro: AviList vs. Clements–Marshall Iliff
2. Summary of 2025 updates–Pam Rasmussen
3. Higher order taxonomic changes–Shawn Billerman
4. Other names, other taxa, and hybrids–Marshall Iliff
5. eBird, taxonomy, and you!–Marshall Iliff
6. Audience Q&A

Featuring:
Dr. Shawn Billerman, Science editor, Birds of the World
Dr. Pamela Rasmussen, Senior research associate – avian systematist, Birds of the World
Marshall Iliff, eBird project leader, taxonomy specialist, common names database manager
Host: Laura Kammermeier

Fun time for all!