164 BIRDS OF THE PUBLIC GARDEN 



green, and Canadian warblers. There had 

 been a thick northeasterly rainstorm the 

 preceding day, and it may be surmised 

 that the insect life on which these warblers 

 feed had been washed from the atmos- 

 phere and the trees to the ground and was 

 found there. The occasion afforded a rare 

 opportunity to view these warblers in the 

 open and below the level of the eye, as they 

 moved about upon the lawns. 



84. BLACK-THROATED GREEN WARBLER 



Dendroica virens 



The Black-throated Green Warbler has 

 not failed to come to the Garden every year ; 

 usually several birds appear. In 1905 two 

 birds, both singing, appealed on May 7, 

 the earliest appearance of the species in 

 any year. These were followed by four 

 other birds successively at intervals, two 

 male birds and two female birds, the last 

 female coming on May 26, which is the 

 latest date for the presence of the species. 

 In this year, therefore, the migration cov- 

 ered twenty days. In 1902 three visitants 



