Roosevelt Wild Life Bulletin 



395 



PAGE 



Figure 148. Colony of quaking aspen, south of Camp on shore of lake (shown 

 in distance) where young trees were much injured by Sap- 

 suckers. Photo 191 6 • 497 



Figure 149. Sapsucker injury to young aspens 497 



Figure 150. Sapsucker injury to young aspens 498 



Figure 151. Colony of aspens and birches at Forestry Camp. The aspens 



were much injured by Sapsuckers. Photo 1916 498 



Figure 152. Nearby view of the aspen clump shown in Fig. 151. Photo 



1916 501 



Figure 153. Detailed view of aspen trunks injured by Sapsuckers 501 



Figure 154. Sapsucker working on aspens. Photo 191 6 502 



Figure 155. Injury to large-toothed aspen by Sapsucker, at Forestry Camp. 502 

 Figure 156. A yellow birch south of the Camp, injured by Sapsuckers. 



Photo 191 5 504 



Figure 157. Detailed view of part of yellow birch trunk shown in Fig. 156. 



Photo by J. Fred Baker 504 



Figure 158. Large yellow birch south of Forestry Camp. This tree had 



been killed by Sapsuckers. Photo 191 5 505 



Figure 159. Section of trunk of yellow birch shown in Fig. 158. Photo by 



J. Fred Baker 505 



Figure 160. Paper birch injured by Sapsuckers and showing swelling of 



trunk 507 



Figure 161. A section of the paper birch trunk shown in Fig. 160 507 



Figure 162. Hemlock trunks, with numerous borings by Sapsuckers, from 

 hardwood forest near Forestry Camp. Photo by J. Fred 



Baker 508 



Figure 163. Beech injured by Sapsuckers, in cut-over forest south of For- 

 estry Camp. Photo 191 5 508 



