ABA Area Introduced Species

By |October 8th, 2020|

One of the questions the RSEC receives most frequently is about which populations of introduced species may be counted in the ABA Area. Version 2020 of the ABA Recording Rules and Interpretations has updated Rule 2.B(v) to help read more >>

The 2020 AOS Supplement is out!

By |June 30th, 2020|

Every summer, birders anxiously await publication of the “Check-list Supplement” by the American Ornithological Society’s Committee on Classification and Nomenclature of North and Middle American Birds (a.k.a. the NACC). The supplement details revisions to the NACC’s Check-list.

2020 AOS Classification Committee Proposals, Parts 2 and 3

By |March 18th, 2020|

We got another big batch of new bird taxonomy proposals submitted to the American Ornithological Society’s North and Middle America Classification Committee for 2020. The AOS NMACC is the volunteer group of ornithologists who make the split, lump, and name-change decisions that influence the ABA Checklist and our field guides.