BIRDS OF AMERICA 



The above Chart is hmited to a consideration of the birds of America, 

 and follows the terminology of the official Check List of the American 

 Ornithologists' Union, and of the preceding pages of the present work. 

 It will be noted that the Class, Birds, comprises seventeen Orders in North 

 America, the names of which are listed in the second circle. These Orders 

 are subdivided into Families. Beginning with the lowest form, the Grebes, 

 the gradual development of bird life can be traced around the circle to 

 the highest form, the Thrushes. 



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