Physical Features and Habitats 27 



Mrs. C. J. Pennock, Miss Josephine Pennock, C. 



B. Ressel, Dr. C. W. Richmond, Alfred D. Sharp- 

 ies, Robert P. Sharpies, Jefferson Shaner, Dr. Wit- 

 mer Stone, Wm. M. Swayne, Jr., Dr. B. H. War- 

 ren, Ezra Webster and M. B. Worth; for ornith- 

 ological notes and comments: Mrs. H. P. Brinton, 



C. G. Burn, J. D. Carter, Miss Sarah C. DeHaven, 

 J. B. Gill, Dr. W. L. Hartman, C. J. Hunt, Thos. 

 H. Jackson, A. C. Redfield, Isaac G. Roberts, Robt. 

 P. Sharpies, Dr. Witmer Stone, C. A. Thomas, Dr. 

 B. H. Warren, Harry Wilson and others. 



My own observations began in the summer of 

 1 884, have continued without a break of more than a 

 few months at a time, up to the present, and extends 

 over the eastern and northeastern parts of the county, 

 with short visits to the south-central and extreme 

 west. My migration records began in the spring of 

 1 885 with a few common migrants, have now reach- 

 ed the thirty-third year, and I am informed that it is 

 the only continuous record for this period in Eastern 

 Pennsylvania. However, sometimes during the most 

 critical time of bird migration, the period of 

 my observation may have been limited to the brief 

 time of going to and returning from my work. I 

 have therefore reserved the right to eliminate a few 

 of my records which according to my judgment are 

 not representative of the true period of arrival or 

 departure; and it was probably with this in mind 

 that prompted the late Prof. W. W. Cooke to write 

 me a short time before his death, urging the publica- 

 tion of my averages and extreme dates. Also the 

 long-term averages taken independently so near 



