English vernacular names mostly follow Gill & Donsker / IOC.
The American spellings 'gray' and 'colored' are used within the English names of taxa mainly occurring in the New World.
Where the English name includes a non-English word or proper name as a qualifier, any diacritic marks are generally retained to aid correct pronunciation.
Where the English name has a qualifying prefix which is frequently omitted by birders in a local British or Western Palaearctic context, the prefix is enclosed within square brackets.
Any conflicts with the international English names recommended by Gill & Donsker / IOC are identified in an additional column. Where a split is not implemented by IOC, the international English name of the parent species is given, preceded by the symbol '>'.