OLIVE-BACKED THRUSH 199 



autumn record of a migrant southward, 

 namely, a bird well seen by him in the 

 Garden on September 24, 1904, giving calls 

 and snatches of song. 



113. Olive-backed Thrush 



Hylocichla ustulata swainsoni 



Swainson's, or the Olive-backed, Thrush 

 visits the Garden regularly, from six to a 

 dozen birds appearing each year. In 1905 

 the first bird came on May 7. The usual 

 time of arrival is May 13 or 14. In 1907 

 the earliest comers were seen on May 18, 

 four birds. Six birds present upon the same 

 day have been twice recorded, namely, May 

 20, 1902, and May 15, 1905. On the former 

 occasion one bird sang the full song many 

 times. On the latter occasion the number 

 was not diminished for three days, and two 

 birds recorded daily up to May 21 may 

 have been two of the little flock of six re- 

 maining seven days. The last birds linger 

 variously to May 22 to 25. One was pre- 

 sent, however, on May 30, in 1907, and one 

 on May 28, in 1908. The strongly buff col- 



