SYSTEMATIC TABLE 



Of the Birds of America north of Mexico, arranged according 



to the American Ornithologists' Union's * Check-List 



of North American Birds', Third Edition, 



1910, and Supplement*, July, 1912. 



(T lie presence of brackets, [ ]. indicates that the species is an accidental visitant.) 



Order PYGOPODES. Diving Birds 



Family COLYMBID^E. GKEBES. 



A.O.U. 

 No. COMMON NAME SCIENTIFIC NAME PAGE 



1 Western Grebe ^Echmophorus occidentalis 44 



2 Holbcell's Grebe Colymbus holbcelli 43 



3 Horned Grebe " auritus 43 



4 Eared Grebe " nigricollis calif ornicus . . 43 



5 Mexican Grebe dominicus brachypterus . 43 



6 Pied-billed Grebe Podilymbus podiceps 43 



Family GAVIID^E. LOONS. 



7 Loon Gavia immer 44 



8 Yellow-billed Loon " adamsi 44 



9 Black-throated Loon " arctica 44 



10 Pacific Loon " pacifica 44 



11 Red-throated Loon " stellata 44 



* The Auk, xxix, 1912, pp. 380-387. 



t Note that trinomials are now employed for all the races of a species 

 including the first one described. Hence in place of No. 13, Puffin, Fratercula 

 arctica, we now have No. 13, Puffin, Fratercula arctica arctica. (See pages 6 and 

 7 for an explanation of this method.) 



Note also that in accordance with a ruling of the A. O. U., the apostrophe 

 is used with the names of birds named after individuals. Thus in place of No. 

 16, Cassin Auklet, we have No. 16, Cassin's Auklet. These changes affect all 

 similar cases throughout the Color Key. After identifying a species, therefore, 

 the student should turn to its number in the Systematic Table to learn whether 

 any change has been made in its name. All alterations other than those of 

 mere nomenclature are given beyond in Appendix I. 



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