6724. Brassy-breasted Tanager
A 'reverse list' of available unclaimed species would really help . . . (hint, hint!)... without the cavalry arriving in some form or other.
Brent Goose and Horned Grebe (as Slav) both gone of that list; Mew Gull (as Common) too. All 3 "jeagers" gone (as skuas, as they should be, of courseReverse list with unclaimed species (up to date till #6712)
No guarantees for different spelling etc (Brant/ Brent Goose etc)
From the count I can see that there must be ~25 already claimed species in this list due to different spelling.