BOSTON PUBLIC GARDEN 51 



part of visiting birds assists an observer 

 very much in determining whether a migrant 

 be a new arrival or a bird he has already 

 observed and recorded, and as to the length 

 of stay of visitants. 



To such an extent is attachment to a 

 limited area manifested, that visiting birds 

 may be quite confidently looked for in the 

 section where they have already been seen, 

 with small chance of disappointment, if the 

 bird still be present and not have taken its 

 departure. In consequence of this attach- 

 ment to a location, even in migration, an 

 observer may state to another person who 

 was absent at the time where he saw a cer- 

 tain bird of especial interest, and observer 

 number two is quite certain to find the 

 object of his desire where it was described 

 to be, and this, it may be, hours afterward, 

 or even on the next day. 



With reference to the singing of the mi- 

 grant birds within the Garden, it may be 

 said that in the notes which follow upon 

 the respective species it is recorded whether 

 the male birds have been heard in song or 



