8 A GUIDE TO THE BIRDS 



which is especially intended for northern Xew York and 

 jSTew England is larger for summer than for other seasons. 

 Many of our summer residents grow less numerous or 

 disappear entirely before the first of September ; very few 

 migrants from the north are seen till the middle of the 

 month, when the arrival of the Black-poll Warblers marks 

 the beginning of the return tide. By the middle of October 

 only a few of our summer residents and a few migrants re- 

 main, and by the first of December we come back to winter 

 fare. The list for the autumn months will include, there- 

 fore, all our permanent residents, all our summer residents, 

 except those that leave before the middle of September, and 

 all the migrants. 



