Archive of invalidated taxa:

2021-09-21: Regulus calendula is invalidated (synonym Corthylio calendula).

2021-08-06: Amphispiza quinquestriata is invalidated (synonym Amphispizopsis quinquestriata).

2021-08-06: Euphonia affinis godmani is invalidated (synonym Euphonia godmani).

2021-08-06: Euphonia musica is invalidated (synonym Chlorophonia musica).

2021-08-06: Euphonia elegantissima is invalidated (synonym Chlorophonia elegantissima).

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).