Supplements to the AOU Check-list of North American Birds, 7th edition, are published annually in the July issue of The Auk. Each supplement incorporates changes accepted in proposals considered by the committee from mid-year of one year to mid-year of the next. Prior to 2012, proposals were numbered by the first year of the two years (i.e., proposals numbered 2011 covered the year 2011-2012, proposals numbered 2010 covered the year 2010-2011, etc.). Beginning with 2012, proposals are numbered by the second year which corresponds to the published supplement (i..e., proposals numbered 2013 cover the year 2012-2013 and are published in the July 2013 issue of The Auk). Because of this change, no proposals are numbered 2012.