The Committee on Classification and Nomenclature of North and Middle American Birds has published the 17th supplement to the seventh edition of the Checklist of North American Birds.
The full supplement is available online
As always, the NACC giveth new species and taketh away. In addition to remembering new names (after blurting out the old names from years of habit), you've got to remember how to spell LeConte's (no space between the Le and the Conte).
Sandpipers and finches have been re-sequenced.
And no surprise - the Yellow-breasted Chat is not a warbler; it is now in its own family.
Proposals and discussions explain the rationale for each decision.