296 Cooke, Winter Ranges of Warblers. [ A "k 



the earliest birds of that species, transients in our latitude, pass 

 hurriedly, and stop only in such kinds of country as most resemble 

 their ultimate destination. In other words, as a general rule, their 

 occurrence in the State in spring becomes extended from the 

 higher lands to the lower as the season advances. 



THE WINTER RANGES OF THE WARBLERS 

 (MNIOTILTID^E). 



BY W. W. COOKE. 



Many expert ornithologists have spent a great deal of time and 

 care in working out the breeding range of each species of North 

 American birds. No comparable effort has been bestowed on the 

 question of the winter home, and as a result many loose state- 

 ments are current in ornithological literature. There seems to be 

 a tendency to consider any record south of the United States as a 

 wintering record, whereas quite a number of species pass in 

 migration through the West Indies or Central America to winter 

 in South America. 



The following tables show at a glance what part of the district 

 south of the United States is occupied as a winter home and what 

 is crossed in migration. It might be added that the charts are 

 not designed to show anything with reference to the breeding 

 range of any of these species; so that the statement, for instance, 

 that Protonotaria citrea occurs in migration in the southeastern 

 United States is not to be taken as indicating that it does not 

 breed in that same 'district. 



The tables are condensed from the Bulletin on the ' Distribu- 

 tion and Migration of North American Warblers ' recently issued 

 by the Biological Survey. 



