DELAWARE VALLEY ORNITHOLOGICAL CLUB. 61 



one of the highest points in tlie State. This should naturally 

 be one of the last points to record the arrival of spring migrants, 

 and comparing the dates with those from the Philadelphia dis- 

 trict, we find about ten days' difference. Compared with other 

 seasons, the spring migration of 1903 was peculiar, and as Mr. 

 Rhoads says in his report, it "sets at naught the averages of 

 many years." All observers seem to agree that there were 

 practically no "waves" and the transient Warblers and 

 Thrushes were either not seen at all or only scattered individ- 

 uals. This was not only so in the Delaware Valley but at 

 Williamsport as well, for Mr. August Koch writes, early in 

 June, that the majority of the Warblers had not been seen up 

 to that time and wonders if the mountain fires had driven them 

 from his neighborhood. 



The almost unprecedented warm weather in the latter part of 

 March, followed by severe cold early in April, had a marked 

 effect upon the migration. Some of the first migrants were 

 much earlier than 1902 while many late ones were later. 



There is a striking correspondence at our various stations in 

 the relative time of arrival as compared with 1902, and a species 

 which is earlier at one station is usually earlier at all at which 

 full records have been kept and vice versa. 



Taking sixteen common species as recorded in four of the 

 Philadelphia sections and at Westtown, where we have a very 

 satisfactory series of observations, we have marked the number 

 of days that the 1903 arrival is earlier or later than that of 1902, 

 except in a few cases where the dates were the same. The dates 

 carried down the side are approximately the time of arrival at 

 Philadelphia in 1902, the intention being to show about the 

 time of spring that the different species appeared, the earliest 

 migrants being placed first: 



