BLACK-THROATED GREEN WARBLER 165 



were present on May 9, but they did not 

 remain. Usually the several appearances 

 have been within the space of eight days, 

 May 13 to 20. In a few instances the stay 

 of the visitant has been extended to the 

 second day, but usually the birds have 

 remained one day only. It is not unusual 

 to hear the song, and yet it is given but 

 little. After a few repetitions the songster 

 has commonly ceased singing, and it has 

 been difficult to trace his presence longer. 

 It has seemed sometimes as if the visitant 

 must have left the Garden, perhaps seek- 

 ing at once the white pines which this war- 

 bler loves so well. On May 12, 1908, one 

 was singing on the Common. 



Three times a Black-throated Green 

 Warbler has visited the Garden in October, 

 once each season in 1904, 1906, and 1908, 

 in all three instances on October 13 ; none 

 remained to a second day. 



