Fifty-Fourth Supplement to the American Ornithologists' Union Check-list of North American Birds

1U.S. Geological Survey, Patuxent Wildlife Research Center, National Museum of Natural History, MRC-111, P.O. Box 37012, Washington, D.C. 20013, USA; 23201 Circle Hill Road, Alexandria, Virginia 22305, USA; 3Bell Museum of Natural History, 10 Church Street, University of Minnesota, Minneapolis, Minnesota 55455, USA; 4Museum of Vertebrate Zoology, 3101 Valley Life Sciences Building, University of California, Berkeley, California 94720, USA; 524 Idaho Street, Bishop, California 93514, USA; 6Florida Museum of Natural History, P.O. Box 117800, University of Florida, Gainesville, Florida 32611, USA; 7Cornell Laboratory of Ornithology, 159 Sapsucker Woods Road, Ithaca, New York 14850, USA; 8Michigan State University Museum and Department of Zoology, West Circle Drive, East Lansing, Michigan 48824, USA; 9Museum of Natural Science, Louisiana State University, Foster Hall 119, Baton Rouge, Louisiana 70803, USA; 10Department of Ecology and Evolutionary Biology, Ramsay Wright Labs, University of Toronto, Toronto, Ontario M5S 3G5, Canada; 11Environment, Culture and Conservation, Field Museum of Natural History, 1400 S. Lake Shore Drive, Chicago, Illinois 60605, USA; and 12University of Alaska Museum, 907 Yukon Drive, Fairbanks, Alaska 99775, USA