YELLOW-GREEN VIREO 321 



to-whitr Apparently the song of this species varies considerably in 

 different localities or in different individual birds. 



Field marks. — The only field mark that will distinguish the black- 

 whiskered vireo from the red-eyed vireo is the rather inconspicuous 

 black malar stripe, which can be seen only at short range. Its song, 

 however, is usually recognizable. 



DISTRIBUTION 



Range. — Southwestern Florida and the Bahamas to northern South 

 America. 



Breeding range. — The black-whiskered vireo breeds in the Bahamas, 

 being found on all the islands that furnish suitable habitat, in Cuba 

 including the Isle of Pines, on the Florida keys as far west as Key 

 West, and on the islands and mainland of the west coast north to 

 Anclote Key. It has also been found breeding at the south end of 

 Lake Okeechobee. 



y^inter range. — The winter home is not fully known, but at that time 

 the species is probably found only in South America, where its occur- 

 rence has been recorded in the Santa Marta region of Colombia, in 

 British Guiana (possibly migrating) , and in the lower Amazon Valley 

 near the mouth of the Rio Tapajoz. 



Migration. — iV few migration dates are available. 



Late date of spring departure from Colombia — Mamatoco, April 

 15. 



Early dates of spring arrival : Cuba — Habana, March 9. Bahamas — 

 New Providence, March 15. Florida — Fort Myers, April 17. 



Late dates of fall departure: Florida — Palma Sola, September 9. 

 Bahamas — Nassau, December 8. Cuba — Camagiiey, October 1. 



Dates of fall arrival are: Panama — Obaldia, Seytember 12. Co- 

 lombia — Bonda, September 16. British Guiana — Bartica Grove, 

 October 8. 



Egg dates. — Bahama Islands : 4 records, June 17 to July 3. 



Florida : 5 records. May 25 to June 28. 



Isle of Pines : 1 record, April 24. 



VIREO FLAVOVIRIDIS FLAVOVIRmiS (Cassin) 



YELLOW-GREEN VIREO 



HABITS 



Contributed by Alexander Frank Skutch 



The long list of migrant birds occurring in Central America is com- 

 posed almost wholly of winter residents — species that breed farther 

 north and pass the cold months there. With very few exceptions, 



