An updated checklist of the Birds of British Columbia 2021, prepared by Jamie Fenneman, is now available on E-Fauna BC. Some species have been added to the list, and some species have been removed. The latter are rare species that either require photo documentation of the sightings or review of the record has not been completed yet by the BC Rare Bird Committee. The checklist follows bird listings provided by the Conservation Data Centre of British Columbia.
Note that detailed information articles on rare/vagrant bird species in BC are provided by Rick Toochin here.