Fifty-First Supplement to the American Ornithologists' Union<i>Check-List of North American Birds</i>

Abstract

orders, and newly recognized or restored families (Pandionidae, Capitonidae, Semnornithidae, Polioptilidae, Cettiidae, Phylloscopidae, Acrocephalidae, Donacobiidae, Megaluridae, Calcariidae, and Viduidae) are added to the main list by splits from existing families. Two families (Ardeidae and Threskiornithidae) are transferred from the order Ciconiiformes to the order Pelecaniformes. New linear sequences are adopted for species in the genera Cyanolyca, Aimophila, and Pipilo, and the sequences of genera within the Cotingidae and portions of the Corvidae and Emberizidae are rearranged to reflect new findings on relationships. One genus (Lipaugus) is moved from Incertae Sedis to the Cotingidae. The family placement of one species (Chamaea fasciata) is changed on the basis of new information on its phylogenetic relationships. The English group names of three orders (Pelecaniformes, Ciconiiformes, and Falconiformes), one suborder (Pelecani), and three families (Ramphastidae, Sylviidae, and Cardinalidae) are modified -CHESSER ET AL. -