Fifty-second supplement to the American Ornithologists’ Union Check-list of North American Birds

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This supplement is the 11th since publication of the seventh edition of the Check-list of North American Birds (American Ornithologists’ Union [AOU] 1998). It summarizes decisions made between 1 April  and 15 April 2011 by the AOU’s Committee on Classification and Nomenclature—North and Middle America. Changes in this supplement include the following: 1) six species (Pterodroma rostrata, Procellaria aequinoctialis, Circus buffoni, Accipiter poliogaster, Gallinago solitaria, and Oryzoborus crassirostris) are added to the main list (including three species transferred from the Appendix) on the basis of new distributional information; 2) two species (Aphelocoma wollweberi and Setophaga flavescens) are added as a result of splits from species already on the list; 3) three species’ names are changed (to Gallinula galeata, Charadrius nivosus, and Chaetura meridionalis) because of splits from extralimital species; 4) two species are changed (to Amazilia brevirostris and Ramphastos ambiguus) by being lumped with extralimital species; 5) the authority for one genus (Peucedramus) is changed; 6) the type localities of two species (Aethia pygmaea and Spizella breweri) are revised; 7) the distributional status of one species (Puffinus nativitatis) is changed; 8) the category of occurrence of one species Chrysomus icterocephalus) is changed; 9) the English name of one species (Aphelocoma ultramarina) is modified as a result of a taxonomic change, and the English name of another species (Turdus nudigenis) is modified to distinguish it from an Old World species; and 10) seven species (Procellaria aequinoctialis, Tigrisoma mexicanum, Heliornis fulica, Chloroceryle amazona, Pachyramphus major, Myadestes occidentalis, and Turdus plumbeus) are added to the list of species known to occur in the United States. More sweeping changes derive from adoption of a new classification of the Parulidae, which results in changes affecting 40 species and 7 genera and adoption of a new linear sequence for general and species in this family. One newly recognized order (Pteroclidiformes) is added to the main list because of a split from an existing order, two newly recognized families (Sapayoidae and Tityridae) are added to the main list by splits from existing families, and one family (Eurylaimidae) is removed because of one of these splits.

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SWAP (2/19/2016) citation (with punctuation corrections in Authors):
Chesser RT, Banks RC, Barker FK, Cicero C, Dunn JL, Kratter AW, Lovette IJ, Rasmussen PC, Remsen JV Jr, Rising JD, et al. 2011. Fifty-second supplement to the American Ornithologists’ Union Check-list of North American Birds. Auk. 128(3):600–613