144 BIRDS OF THE PUBLIC GARDEN 



make several successive appearances in the 

 Garden. Three or four visitants in a sea- 

 son constitute the rule. Twice the usual 

 number were recorded in 1907 and again in 



1 905. Many of the visitants remain three 

 or four days. In 1908 a female bird was 

 present from May 14 to 19, six days. The 

 earliest appearance was on April 30, in 



1906, one bird. In 1902 the first \-isitant, 

 a female bird, came on May i. In 1908 

 the first visitant, a male bird, came on the 

 same date. 'Slay 7 to 12 has been the usual 

 time of appearance of the species. The 

 migration has commonly extended to May 

 21 or 22, sometimes, however, ending on 

 May 17 or 18. In 1908 it extended to May 

 25, covering t^^ent>'-five days. On several 

 occasions two or three birds have been 

 present on the same day. Not infrequently 

 the visitant has been in song. On account 

 of the creeping habit of this warbler and 

 its rather toneless song, it may be more 

 easily overlooked than many other war- 

 blers, whose constant flit tings among the 

 boughs with only partially developed leaf- 

 age are more likely to attract attention. 



