Bui. 39, Biological Survey, U. S. Dept. of Agriculture. 
Plate V. 
Work of Flicker and Sapsuckers. 
[1, Holes made by flicker in ranch buildings near Hay wards, Cal. 2. Type of sapsuckerwork on 
white birch: 3, on apple: 4. on willow (SaUx cordata), holes enlarged vertically by continued 
excavation at upper end; 5, on willow, almost complete barking; 6, on pitch pine, tree killed.] 
