"iA LooMis o>i Birds of Chester County, Smith Carolina. [January 



varies. Those that have been hhidered from any cause in 

 bringing up young ai'e later in starting than other representatives 

 of the same species. Some species finish breeding early, and 

 depart early, while others are tardy breeders or normally raise 

 second broods. That second broods, however, are habitually 

 reared by but comparatively few species in this vicinity, is my 

 firm conviction. Of recent years my attention has been so 

 largely fixed upon other lines of field work that I have not been 

 able to devote the careful observation necessary to determine, 

 even with approximate exactness, the time when the first stages 

 of movement take place in each species breeding here. About 

 the 3oth of June, however, if not a little sooner in some years, 

 appears to be the date of the inception of the migration.* 



With July come the first Warblers that are not known to breed 

 hereabouts, — the American Redstart, Worm-eating Warliler, 

 Louisiana Water-thrush. All, however, rear their young nearby 

 in the mountains. It is worthy of note, that all these early 

 comers, that I have taken, and others in August, have been birds- 

 of-the-year. They were probably stragglers of short migration, 

 the adults having previously passed over us in their southern 

 flight. In evidence of this, it should be mentioned that at Mt. 

 Pinnacle and Ciesar's Head the adults of the Louisiana Water- 

 thiaish disappeared about the middle of June. Furthermore, a 

 number of common summer residents of the Southern Alleghanies 

 pass in their migration southward without stopping in this locality, 

 being rarely or never detected. Circumstances similar to this case 

 of the prior occurrence of hornotines have very likely led to the 

 belief, entertained by many, that the young precede the old in 

 journeying southward. f 



The migratory impulse is further manifested in July by the 

 continued desertion of summer residents. Toward the end the 



*In this connection note the arrival of Warblers in July at Key West, Scott, Auk, 

 Vol. VII, pp. 16-22. 



tFrom the very nature of the case it cannot be afifirmed with certitude that the first 

 arrivals at a given location (particularly one having a great stretch of territory to the 

 northward) are the first birds that have migrated from any common starting point — 

 the place of breeding. On the contrary, when adult birds have grown scarce in a lo- 

 cality and the young remain in force, and there have been no fluctuations in abun- 

 dance indicating movement from above, and adults of the same species occur soon 

 after in the region lying to the southward of the breeding range, it does seem to be 

 proven that the young do not migrate earlier than their parents. 



