42 



ROUTES OF MIGRATION 



The observations of Scott* and Bennettf in the Tortugas show 

 that these islets evidently lie in a migratory highway, and we know as 

 yet too little about the birds of western Cuba to be sure that many 

 of the birds which pass over them do not pause on that island. But, 



FIG. 5. Migration of the Blackpoll Warbler. A species which breeds as far north- 

 west as Alaska, but leaves North America through Florida, and reaches South 

 America through the West Indies, avoiding Mexico and Central America. 



Dotted area Breeding range. Black area Winter range. Arrows Migration 

 route. 



in any event, it is evident that, whether to or from western Cuba and 

 Yucatan, there is a direct flight across the Gulf to or from western 

 Florida, and, as Cooke ('05) remarks, it is this route which is followed 

 by most of our migrant land-birds which winter in South America. 

 He sums the matter up as follows: 



*The Auk, VII, 1890, pp. 301-314. t Bird-Lore, XI, 1909, pp. 110-113. 



