The American Birding Association (ABA) is "a non-profit organization that provides leadership to birders by increasing their knowledge, skills and enjoyment of birding".
The ABA maintains a checklist for its area which is carefully assessed and regularly updated. This checklist refers to the 'ABA Area', i.e. the 49 continental United States, Hawaii, Canada, the French islands of St. Pierre and Miquelon, and adjacent waters to a distance of 200 miles from land or half the distance to a neighboring country, whichever is less. Bermuda, and Greenland are not included.
Note that prior to 2016 the ABA Area excluded Hawaii, and we include this area as 'ABA Continental Traditional': please do not add Hawaiian species to any lists for ABA Continental Traditional.
The most recent update of the ABA list was to incorporate the 2023 midterm report.