19 November 2009: HBW Vol. 14 taken into account.
26 August 2009: IOC World Bird List Version 2.2 taken into account.
7 July 2009: China Bird Report 2007 taken into account.
15 June 2009: BirdLife International checklist Version 2 taken into account.
18 May 2009: IOC World Bird List Version 2.1 and IUCN Red List 2009 taken into account.
29 April 2009: ABC African Checklist (May 2009 version) taken into account.
24 February 2009: OSME Regional List (3rd Edition Consultative Draft Jun 2008) taken into account.
22 February 2009: IOC family-level taxonomy adopted.
13 February 2009: Dutch Birding 31(1) 'Editorial notes: Taxa names in Dutch Birding' taken into account.
23 January 2009: IOC World Bird List Version 2.0 taken into account.
6 January 2009: In cases of conflict, generic assignments of Eastern Palearctic species changed to follow IOC World Bird List (rather than Howard & Moore 3rd Edition).
16 December 2008: Several species occurring marginally in NE Querétaro added.
26 November 2008: Clements Checklist Updates & Corrections (Nov 26, 2008) taken into account.
21 November 2008: König & Weick 2008 (Owls of the World, 2nd Ed) taken into account.
7 November 2008: HBW Vol. 13 taken into account.
3 November 2008: Kirwan et al 2008 (The Birds of Turkey) re-evaluation of subspecific limits taken into account.
2 November 2008: Howard & Moore 3rd Edition Corrigenda 8 taken into account.
27 October 2008: IOC World Bird List Version 1.7 international English name changes taken into account.
25 September 2008: BOURC TSC 5th report taken into account.
22 August 2008: Exceptional oriental wanderers to above regional altitudinal limits in Himalaya removed (for consistency with exclusion of extreme vagrants elsewhere).
31 July 2008: 49th supplement to the AOU Check-list of North American Birds taken into account.
2 July 2008: IOC World Bird List Version 1.6 taken into account.
19 May 2008: BirdLife International checklist Version 1 taken into account (including IUCN Red List 2008 final changes).
10 May 2008: UK400 Club WP List (Apr 2008) taken into account.
14 April 2008: SE Iran now included within Western Palearctic (for purposes of regional distribution summary).
7 April 2008: Splits adopted by Handbook of the Birds of the World Vols. 1-12 indicated. HBW Vols. 7-12 (published subsequent to Dickinson (2003) (Howard & Moore) cut-off date) taken as revised baseline for subspecies recognition where applicable.
14 March 2008: For additional clarity, comments defining each implemented split added.
6 March 2008: Several additional Mexican species marginally occurring within Nearctic region included.
2 March 2008: Splits adopted by BirdLife International indicated.
19 February 2008: UK400 Club WP List (Feb 2008) taken into account.
14 February 2008: China Bird Report 2006 taken into account.
9 February 2008: Dutch Birding 30(1) 'Editorial notes: Taxa names in Dutch Birding' taken into account.
5 February 2008: Splits identified, but not yet formally recognised, by OBC and by Gill & Wright / IOC indicated.
31 January 2008: IOC World Bird List Version 1.5 taken into account.
16 January 2008: BOURC 36th Report taken into account.
21 December 2007: Howard & Moore 3rd Edition Corrigenda 7 taken into account.
20 December 2007: Provisional IUCN Red List 2008 revisions indicated.
24 November 2007: Subspecies added. Identifies the forms which regularly occur within the regional limits, and clarifies the racial scope of splits (and potential/historical splits).
29 October 2007: Regional species subtotals evaluated.
24 October 2007: Splits adopted by OSME indicated.
23 October 2007: IUCN Red List status added.
17 October 2007: Additional forms included following review of passerine sections by Daniel Philippe (to whom many thanks).
9 October 2007: BOURC TSC 4th report & Clements Checklist updates (Oct 2007) taken into account.
9 September 2007: Mexican potential splits identified by Navarro-Sigüenza & Peterson (2004) included. Additional forms included following review of remaining non-passerine sections by Daniel Philippe.
4 September 2007: Additional forms included following review of Anseriformes, Galliformes and Podicipediformes sections by Daniel Philippe.
13 August 2007: International English names recommended by Gill & Wright / IOC (2006) added.
26 July 2007: 48th supplement to the AOU Check-list of North American Birds taken into account.
9 July 2007: Splits adopted by Clements (2007) indicated.
4 July 2007: Historical AOU splits (subsequently lumped) incorporated (as trinomials) to highlight further interesting forms.
18 April 2007: Regional distribution summary refined: for greater consistency with the approach followed for the Palearctic, most taxa on the ABA Checklist categorised as Code-3 (Rare) now classified as regularly occurring within the Nearctic.
2 April 2007: Authorities adopting each implemented split indicated.
7 March 2007: Website created.
