42 ROUTES OF MIGRATION 
The observations of Scott* and Bennett} 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, 
<a 
Fic. 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, 
parent 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, }Bird-Lore, XI, 1909, pp. 110-113. 
