2021-08-06: Estrilda caerulescens is invalidated (synonym Glaucestrilda caerulescens).
2021-08-06: Melopyrrha portoricensis portoricensis is invalidated (synonym Melopyrrha portoricensis).
2021-08-06: Melopyrrha portoricensis grandis is invalidated (synonym Melopyrrha grandis).
2021-08-06: Cistothorus platensis stellaris is invalidated (synonym Cistothorus stellaris).
2021-08-06: Sitta pusilla pusilla is invalidated (synonym Sitta pusilla).
2021-08-06: Sitta pusilla insularis is invalidated (synonym Sitta insularis).
2021-08-06: Deltarhynchus is invalidated (synonym Ramphotrigon).
2021-08-06: Deltarhynchus flammulatus is invalidated (synonym Ramphotrigon flammulatum).
2021-08-06: Caracara cheriway is invalidated (synonym Caracara plancus).
2021-08-06: Pseudoscops is invalidated (synonym Asio).
2021-08-06: Pseudoscops grammicus is invalidated (synonym Asio grammicus).
2021-08-06: Pseudoscops clamator is invalidated (synonym Asio clamator).
2021-08-06: Strix varia sartorii is invalidated (synonym Strix sartorii).
2021-08-06: Phalacrocorax pelagicus is invalidated (synonym Urile pelagicus).
2021-08-06: Phalacrocorax brasilianus is invalidated (synonym Nannopterum brasilianum).
2021-08-06: Phalacrocorax auritus is invalidated (synonym Nannopterum auritum).
2021-08-06: Phalacrocorax urile is invalidated (synonym Urile urile).
2021-08-06: Phalacrocorax penicillatus is invalidated (synonym Urile penicillatus).
2021-08-06: Larus canus brachyrhynchus is invalidated (synonym Larus brachyrhynchus).
2021-08-06: Calliphlox is invalidated (synonym Philodice).