W'lDM ANN, Ox\ Spring Migration. 55 



the leaves of trees. Vireos, Warblers, Orioles and others ex- 

 perienced the greatest delay, while Thrushes and other ground 

 feeders were less irregular. 



Spring migration started as usual. Juncos, for instance, 

 appeared in force on [March 15th and reached maximum on 

 the ^Oth. [Most of them had passed on, but flocks continued to 

 arrive when the change in the weather came at the end of the 

 month and, while in most years juncos are rarities after the 

 middle of April, this year they were present in force until 

 the 20th and stragglers until Alav 4th. 



Fox Sparrows cams as usual March 15th and were un.- 

 usually numerous March 20th to 25th, but the hot weather 

 took them all oh' at once and none were seen after the 25th, 

 while in other years their transit Is extended into April, some- 

 tim.es to the third week of it. 



White-throats kept their normal dates pretty well. The 

 van appeared as usual at the middle of March (IGth) and the 

 hot period did not affect them' visibly; but the bulk, the great 

 army, due April 20th, came a week behind time, April 28th, 

 and remained with us a week later than in other years, to 

 May 12th ; the last ones were seen May ITth, the middle of 

 [May being the usual time for them. 



White-crowns, too, did not deviate much from the rule, 

 appearing in numbers [May 3rd, but contrasting with their 

 usual soldier-like precision, when nearly the entire army 

 passes witliin a few days and all are gone after the 15th; 

 this year's passage was dragging with the 22nd for last day, 

 breaking the record of the state by four days. 



The middle of March marks the invasion of this region by 

 north-bound Song Sparrows and the bulk was here promptly 

 on the 17th, but induced to rapid transit by the heated term 

 the species ordinarily three weeks in passing had disappeared^ 

 after the 25th and none were seen between March 25th and 

 [May 12th. when from that day until [May 30th Song Sparrows 

 were seen and heard to sing in tiiree places not known to be 

 breeding stands. Whether these individuals were belated 

 transients or summer residents spreading to entirely new 

 territorv remains to be seen. 



