Taxonomy and zoological nomenclature
My database shows 11,072 species, which matches the data in the Version 11.2 spreadsheet. However I don't have an extant/extinct breakdown of that number.
Do you each have your own bird checklist? If so, I would like to see themMy count gets 11072 species (124 extinct; 36 recently extinct) and 25983 recognised birds (species or subspecies).