378 THE STRUCTURE AND LIFE OF BIRDS CH. XIV 
It is very remarkable that the study of birds, of all 
animals the greatest wanderers, should have laid the 
foundation of animal geography. Though the subject 
of the geographical distribution of birds is one of 
great interest, a detailed account of it is beyond the 
scope of this book. It is only necessary to make it 
clear that it must be carefully distinguished from 
migration. The reader is referred to the article in 
Professor Newton’s Dictzonary of Birds. 
