REPORT 
ON THE 
Birds op Pennsylvania 
With Special Reference to the Food-Hahits, based on over Four 
Thousand Stomach Examinations. 
BY 
B. H. WARREN, M. D„ 
NITHOL.OGIST, PENNSYLVANIA STATE BOARD OF AGRICULTURE. 
SECOND EDITION, REVISED AND AUGMENTED. 
illustrated by One Hundred Plates. 
Published by Authority of the Commonwealth. 
HARRISBURG: 
E, K. MEYEES, STATE PEINTEE. 
1890. 
