What is a 'rare bird'-- and when and whence? Migration and vagrancy in birds ; Where do North American vagrants come from? ; Topography, molt, and aging -- Species accounts. Waterfowl ; Sungrebes ; Alcids ; Pelagic seabirds ; Gulls and terns ; Shorebirds ; Wading birds ; Raptors and owls ; Larger landbirds ; Aerial landbirds ; Songbirds -- Appendix A. Species new to North America, Fall 2011-Summer 2012 -- Appendix B. Species of hypothetical occurrence -- Appendix C. Birds new to North America, 1950-2011.
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