REPORT 



ON THE 



BIEDS OF PENNSYLVANIA. 



WITH SPECIAL REFERENCE TO THE FOOD-HABITS, BASED 



ON OVER THREE THOUSAND STOMACH 



EXAMINATIONS. 



BY 



B. H. WARKEN, M. D., 



ORNITHOLOGIST OF THE STATE BOARD OF AGRICULTURE ; ASSOCIATE MEMBER OF THE AMERICAN 



ORNITHOLOGIST'S UNION; SECRETARY OF THE CHESTER COUNTY (PA.) 



ACADEMY OF ARTS AND SCIENCES, ETC. 



ILLUSTRATED WITH FIFTY PLATES, 



HAREISBURG: 



EDWIN K. MEYERS, STATE PRINTER. 



1888. 



