10 January 2026

• Added Connecticut Warbler Oporornis agilis to the review list.
• Added Northern Cardinal Cardinalis cardinalis to the review list.
• Removed Short-tailed Albatross Phoebastria albatrus from the review list.
• Removed Glossy Ibis Plegadis falcinellus from the review list.

09 January 2026

• Added Waved Albatross Phoebastria irrorata to the main and review lists.
• Added Dark-sided Flycatcher Muscicapa sibirica to the main and review lists.

05 December 2025

• Corrected list sequence in genus Haliaeetus.

23 August 2025

• Added Stejneger's Scoter Melanitta stejnegeri to the main and review lists.


Stejneger's Scoter, 15 January 2014, Watsonville SCZ © John Garrett

14 August 2024

• Updated names, list sequence, and taxonomy to conform to the 66th supplement of the AOS Check-List
• Added Bulwer's/Jouanin's Petrel Bulweria bulwerii/fallax to the supplemental review list.
• Removed evidence code "P" for Jouanin's Petrel

07 July 2025

• Added Song Thrush Turdus philomelos to the main and review lists.


Song Thrush, 12 Nov 2024, Southeast Farallon Is., SF © Adrian Hinkle

19 December 2024

• Added Slate-throated Redstart Myioborus miniatus to the main and review lists.


Slate-throated Redstart, 31 July 2024, Pine Lake Park, San Francisco, SF © Langtian Lang

17 October 2024

• Added Siberian Pipit Anthus japonicus to the main and review lists.

15 October 2024

• Added White-tailed Eagle Haliaeetus albicilla to the main and review lists.


White-tailed Eagle, 15 March 2024, Battery Godfrey, San Francisco, SF © Keith Maley

14 August 2024

• Added Blue Rock-thrush Monticola solitarius to the main and review lists.


Blue Rock-thrush, 26 Apr 2024, Southeast Farallon Is., SF © Jason Talbott

18 July 2024

• Updated names, list sequence, and taxonomy to conform to the 65th supplement of the AOS Check-List

13 January 2024

• Removed Mississippi Kite Ictinia mississippiensis from the review list.
• Removed White Wagtail Motacilla alba from the review list.
• Removed Cassin's Sparrow Peucaea cassinii from the review list.

04 December 2023

• Added Ainley's Storm-Petrel Hydrobates cheimomnestes to the main and review lists.

01 October 2023

• Corrected list sequence in genus Artemisiospiza.

18 September 2023

• Added Siberian Rubythroat Calliope calliope to the main and review lists.

06 July 2023

• Updated names, list sequence, and taxonomy to conform to the 64th supplement of the AOS Check-List.

21 May 2023

• Added Small-billed Elaenia Elaenia parvirostris to the main and review lists.
• Addid Willow Warbler Phylloscopus trochilus to the main and review lists.
• Added Wood Warbler Phylloscopus sibilatrix to the main and review lists.


Wood Warbler, 16 Oct 2022, Willow Springs Park LA, © Thomas A. Benson



15 January 2023

• Removed Slaty-backed Gull Larus schistisagus from the review list.
• Removed Great Crested Flycatcher Myiarchus crinitus from the review list.
• Added Yellow Grosbeak Pheucticus chrysopeplus to the Supplemental list.

05 August 2022

• Updated names, list sequence, and taxonomy to conform to the 63rd supplement of the AOS Check-List

29 June 2022

• Added Nanday Parakeet Aratinga nenday to the main list as an introduced species
• Red-masked Parakeet Psittacara erythrogenys to the main list as an introduced species

07 February 2022

• Corrected list sequence in genus Phylloscopus

15 January 2022

• Removed Ruddy Ground Dove Columbina talpacoti from the review list
• Removed Hudsonian Godwit Limosa haemastica from the review list
• Removed Bar-tailed Godwit Limosa lapponica from the review list
• Removed Yellow-billed Loon Gavia adamsii from the review list
• Removed Masked Booby Sula dactylatra from the review list
• Removed Tricolored Heron Egretta tricolor from the review list
• Removed White-eyed Vireo Vireo griseus from the review list
• Removed Blue-headed Vireo Vireo solitarius from the review list
• Removed Common Redpoll Acanthis flammea from the review list
• Removed Snow Bunting Plectrophenax nivalis from the review list
• Removed Common Grackle Quiscalus quiscula from the review list
• Removed Worm-eating Warbler Helmitheros vermivorum from the review list
• Removed Connecticut Warbler Oporornis agilis from the review list
• Removed Mourning Warbler Geothlypis philadelphia from the review list
• Removed Kentucky Warbler Geothlypis formosa from the review list
• Removed Cape May Warbler Setophaga tigrina from the review list
• Removed Grace's Warbler Setophaga graciae from the review list

02 January 2022

• Added Mitred Parakeet Psittacara mitratus to the main list as an introduced species
• Added Lilac-crowned Parrot Amazona finschi to the main list as an introduced species

20 August 2021

• Added Mexican Duck Anas diazi to the main and review lists


Mexican Duck, 26 October 2011, Earp, SBE © David Vander Pluym

07 July 2021

• Updated names, list sequence, and taxonomy to conform to the 62nd supplement of the AOS Check-List

12 February 2021

• Corrected English name of Rhynchophanes mccownii to conform to the AOS Check-List

19 January 2021

• Removed Broad-billed Hummingbird Cynanthus latirostris from the review list
• Added evidence code "P" to Yellow-browed Warbler

30 June 2020

• Updated names, list sequence, and taxonomy to conform to the 61st supplement of the AOS Check-List

28 April 2020

• Added Yellow-browed Warbler Phylloscopus inornatus to the main and review lists.

20 January 2020

• Added Wood Stork Mycteria americana to the review list
• Removed Nazca Booby Sula granti from the review list
• Removed Masked/Nazca Booby Sula dactylatra/granti from the review list
• Removed Red-footed Booby Sula sula from the review list
• Removed Rusty Blackbird Euphagus carolinus from the review list

15 January 2020

• Corrected Albatross Thalassarche sp. list sequence

12 November 2019

• Corrected evidence code for Eurasian Wryneck.
• Added audio (A) evidence codes for Eurasian Skylark, Veery, and Eastern Yellow Wagtail.

08 November 2019

• Corrected Meadowlark Sturnella sp. list sequence

27 September 2019

• Added Yellow-chevroned Parakeet Brotogeris chiriri and Red-whiskered Bulbul Pycnonotus jocosus) to the main list.

30 June 2019

• Updated names, list sequence, and taxonomy to conform to the 60th supplement of the AOS Check-List

28 January 2019

• Added Gray Thrasher Toxostoma cinereum to the supplemental list.
• Added Kentucky Warbler Geothlypis formosa to the review list.

11 December 2018

• Added Eastern Meadowlark Sturnella magna to the main and review lists.

1 October 2018

• Removed evidence code "P" from Masked Booby.
• Removed evidence code "P" from Nazca Booby.

30 September 2018

• Added Tropical Parula Setophaga pitiayumi to the main and review lists.

26 June 2018

• Changed evidence code for White-winged Crossbill from "S" to "P".

22 June 2018

• Updated names, list sequence, and taxonomy to conform to the 59th supplement of the AOS Check-List

11 May 2018

• Added Band-rumped Storm-Petrel Oceanodroma castro and to the main and review lists.
• Added Citrine Wagtail Motacilla citreola to the main and review lists.

21 April 2018

• Moved Oriental Greenfinch Chloris sinica from the supplemental list to the main and review lists.

20 January 2018

• Added Kermadec Petrel Pterodroma neglecta and Jouanin's Petrel Bulweria fallax to the main and review lists.
• Removed Dusky-capped Flycatcher Myiarchus tuberculifer from the review list

16 January 2018

• Added Eurasian Wryneck Jynx torquilla to the main and review lists.

14 November 2017

• Corrected scientific names of Wedge-tailed and Sooty Shearwaters for gender agreement.

05 July 2017

• Updated names, list sequence, and taxonomy to conform to the 58th supplement of the AOS Check-List

01 February 2017

• Added Salvin's/Chatham Albatross Thalassarche salvini/Thalassarche eremita to the appended species groups on the review list.

29 January 2017

• Removed Magnificent Frigatebird Fregata magnificens from the review list
• Removed Magnificent/Great/Lesser Frigatebird Fregata magnificens/minor/ariel from the appended species groups on the review list.
• Removed Little Gull Hydrocoloeus minutus from the review list

17 January 2017

• Added Purple Sandpiper Calidris maritima to the main and review lists.
• Added Buff-breasted Flycatcher Empidonax fulvifrons to the main and review lists.

8 July 2016

• Updated names, list sequence, and taxonomy to conform to the 57th supplement of the AOU Check-List.

30 January 2016

• Added Ruddy Ground-Dove Columbina talpacoti to the review list.

13 January 2016

• Added Chatham Albatross Thalassarche eremita to the main and review lists.
• Added Kelp Gull Larus dominicanus to the main and review lists.

03 October 2015

• Added Common Scoter Melanitta nigra to the main and review lists.

02 July 2015

• Updated names, list sequence, and taxonomy to conform to the 56th supplement of the AOU Check-List

26 January 2015

• Replaced Taiga/Tundra Bean-Goose Anser fabalis/serrirostris with Tundra Bean-Goose Anser serrirostris on the main and review lists.
• Added Taiga/Tundra Bean-Goose Anser fabalis/serrirostris to the appended species groups on the review list.
• Replaced Frigatebird sp. Fregata sp. with Magnificent/Great/Lesser Frigatebird Fregata magnificens/minor/ariel to the appended species groups on the review list.
• Removed Blue-footed Booby Sula nebouxii from the review list.
• Removed Yellow-green Vireo Vireo flavoviridis from the review list.
• Replaced Arctic Warbler Phylloscopus borealis with Arctic/Kamchatka Leaf Warbler (Phylloscopus borealis/examinandus) on the main and review lists.

18 December 2014

• Added Salvin's Albatross Thalassarche salvini to the main and review lists.
• Added Nazca Booby Sula granti to the main and review lists.

07 August 2014

• Updated names, list sequence, and taxonomy to conform to the 55th supplement of the AOU Check-List

02 February 2014

• Added Marsh Sandpiper Tringa stagnatilis to the main and review lists.
• Added "A" to the evidence code for Eastern Whip-poor-will.
• Added Common Swift Apus apus to the main and review lists.

19 January 2014

• Removed Hawaiian Petrel Pterodroma sandwichensis from the review list.
• Removed Galapagos/Hawaiian Petrel Pterodroma phaeopygia/Pterodroma sandwichensis from the appended species pairs on the review list.
• Changed "species pairs" to "species groups" and added Frigatebird sp. Fregata sp. to the appended species groups on the review list.
• Removed Nazca Booby Sula granti from the appended supplemental list on the main list.
• Removed Neotropic Cormorant Phalacrocorax brasilianus from the review list.
• Added new category code "RI" - Reintroduction in progress - not yet established.
• Changed category for California Condor Gymnogyps californianus from E to RI on the main list.
• Removed Pine Warbler Setophaga pinus from the review list.

27 August 2013

• Added Great Black-backed Gull Larus marinus to the main and review lists.
• Added Nutmeg Mannikin Lonchura punctulata to the main list with a code of "I"

08 August 2013

• Updated names, list sequence, and taxonomy to conform to the 54th supplement of the AOU Check-List

23 April 2013

• Corrected the generic name of the Belted Kingfisher Megaceryle alcyon on the main list

07 April 2013

• Added Gray Hawk Buteo plagiatus to the main and review lists

17 March 2013

• Corrected the list sequence position of Tristram's Storm-Petrel Oceanodroma tristrami

22 January 2013

• Added Taiga/Tundra Bean-Goose Anser fabalis/Anser serrirostris to the main and review lists
• Removed Taiga/Tundra Bean-Goose Anser fabalis/Anser serrirostris from the appended species pairs on the review list
• Added Common Crane Grus grus to the main and review lists
• Added Common Cuckoo Cuculus canorus to the main and review lists
• Removed Yellow-crowned Night-Heron Nyctanassa violacea from the review list
• Removed Harris's Hawk Parabuteo unicinctus from the review list
• Removed Lesser Black-backed Gull Larus fuscus from the review list and removed its evidence code
• Removed Parakeet Auklet Aethia psittacula from the review list
• Added evidence code for Northern Gannet

27 August 2012

• Fixed a regression error introduced 23 July 2012 which inadvertently added Trumpeter Swan Cygnus buccinator and Yellow-throated Warbler Setophaga dominica back on the review list

03 August 2012

• Added Northern Gannet Morus bassanus to the main and review lists

23 July 2012

• Updated names, list sequence, and taxonomy to conform to the 53rd supplement of the AOU Check-List

01 July 2012

• Appended Taiga/Tundra Bean-Goose Anser fabalis/Anser serrirostris to review list

12 March 2012

• Added "P" to the evidence code for Common Snipe
• Minor cosmetic changes to review list

11 March 2012

• Added Common Snipe Gallinago gallinago to the main and review lists

16 February 2012

• Added "A" to the evidence code for Common Ringed Plover Charadrius hiaticula

12 February 2012

• Added Common Ringed Plover Charadrius hiaticula to the main and review lists

15 January 2012

• Removed Trumpeter Swan Cygnus buccinator from the review list
• Removed Yellow-throated Warbler Setophaga dominica from the review list

27 December 2011

• Corrected spelling of review list hybrid

26 July 2011

• Updated names, list sequence, and taxonomy to conform to the 52nd supplement of the AOU Check-List

11 June 2011

• Added Eastern Whip-poor-will Caprimulgus vociferus to the main and review lists

03 May 2011

• Corrected the apostrophe in the spelling of three bird names

18 January 2011

• Added Fulvous Whistling-Duck Dendrocygna bicolor to the review list
• Added Cape May Warbler Dendroica tigrina to the review list

23 November 2010

• Added Winter Wren Troglodytes hiemalis to the main and review lists

05 September 2010

• Added White-chinned Petrel Procellaria aequinoctialis to the main and review lists

30 July 2010

• Updated names, list sequence, and taxonomy to conform to the 51st supplement of the AOU Check-List

20 May 2010

• Added Hawaiian Petrel Pterodroma sandwichensis to the main and review lists
• Removed "Dark-rumped Petrel" Pterodroma phaeopygia/Pterodroma sandwichensis from the main list

15 January 2010

• Appended Galapagos/Hawaiian Petrel Pterodroma phaeopygia/Pterodroma sandwichensis to the review list
• Appended Masked/Nazca Booby Sula dactylatra/Sula granti to the review list
• Appended Blue-winged X Golden-winged Warbler Vermivora pinus X V. chrysoptera to the review list
• Changed the "T" for "tape recording" to "A" for "audio recording" to conform to the CBRC book

09 January 2010

• Removed American Golden-Plover Pluvialis dominica from the review list
• Added Elf Owl Micrathene whitneyi to the review list

15 July 2009

• Updated names, list sequence, and taxonomy to conform to the 50th supplement of the AOU Check-List

08 February 2009

• Added Bluethroat Luscinia svecica to the main and review lists

17 January 2009

• Removed Mottled Petrel Pterodroma inexpectata from the review list
• Added Magnificent Frigatebird Fregata magnificens to the review list
• Removed Sprague's Pipit Anthus spragueii from the review list

16 January 2009

• Removed American Oystercatcher Haematopus palliates from the review list

28 July 2008

• Updated names, list sequence, and taxonomy to conform to the 49th supplement of the AOU Check-List

28 March 2008

• Added Eurasian Kestrel Falco tinnunculus to the main and review lists
• Added Common Rosefinch Carpodacus erythrinus to the main and review lists

27 March 2008

• Added Swallow-tailed Kite Elanoides forficatus to the main and review lists

02 February 2008

• Added Tristram's Storm-Petrel Oceanodroma tristrami to the main and review lists

19 January 2008

• Removed Manx Shearwater Puffinus puffinus from the review list
• Removed Brown Booby Sula leucogaster from the review list
• Removed Yellow-throated Vireo Vireo flavifrons from the review list
• Removed Scarlet Tanager Piranga olivacea from the review list

06 Jan 2008

• Added Wood Sandpiper Tringa glareola to the main and review lists

08 November 2007

• Added Townsend's Shearwater Puffinus auricularis to the main and review lists
• Added Lesser Frigatebird Fregata ariel to the main and review lists
• Removed Little Shearwater Puffinus assimilis from the main and review lists

30 July 2007

• Updated names, list sequence, and taxonomy to conform to the 48th supplement of the AOU Check-List