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411 The Black-tailed Shearwater, Priofinus cinereus 2009 



412 The Fork-tailed Petrel, Oceanodroma furcata 2010 



413 The Leach Petrels, Oceanodroma leucorhoa 2013 



414 The Coues Petrel, Oceanodroma homochroa 2024 



415 The Black Petrel, Oceanodroma melania 2027 



416 The Wilson Petrel, Oceanites oceanicns 2029 



Order Gaviae — Loons, Divers. 

 Family Gaviidce — Loons. 



417 The Common Loon, Gavia immer 2030 



418 The Pacific Loon, Gavia arctica pacifica 2034 



419 The Red-throated Loon, Gavia stellata 2036 



Order Podicipedes — Grebes. 



Family Podicipedidce — Grebes. 



420 The Western Grebe, /Echmophorus occidental-is 2039 



421 The Holbcell Grebe, Colymbus grisegena holbcelli 2047 



422 The Horned Grebe, Colymbus auritus 2048 



423 The American Eared Grebe, Colymbus nigricollis calif amicus . . 2051 



424 The Pied-billed Grebe, Podilymbus podiceps 2057 



Analytical Keys 2067 



Index 2103 



XI 



