BIRDS AND FOREST VEGETATION 31 



2. Under what kinds of trees do you rind cherry stones? 

 List them. Can dispersal by wind explain the location of these 

 seeds? Direction of prevailing winds? 



3. Of the seeds that are scattered, do all of them grow, or, 

 if so, to full size? Is the above absence of plants proof that the 

 seeds have not been scattered? 



4. Note bird excrement. Where found and relative abund- 

 ance? 



5. Do you find any evidence of the location of bird roosts? 

 Describe fully. 



C. CONCLUSIONS AND PRACTICAL APPLICATIONS 



(a) THE INFLUENCE OK THE SCATTERED SEEDS UPON THE FOREST 



1. How have the introduced seeds and plants changed the 

 character of the forest in its trees, shrubs, herbs? 



2. How would the bird-introduced plants influence the pres- 

 ent forest as a bird habitat if left uncut for a few years? 



3. Do the seeds of the introduced plants germinate in open 

 grass lands like the original prairie before the sod was broken ? 



4. Do the animals which now live and breed in the forestry 

 regularly breed in open meadows? 



5. What effect has the planting of the first trees had upon 

 the invasion of the area by new organisms? 



6. State the composition of the forest which would succeed 

 the present one if left uncut. Would it be denser or less dense? 

 Would it favor the same or different kinds of animals? 



(b) PRACTICAL APPLICATIONS 



i. What kinds of trees and shrubs should be planted if you 

 wish to attract birds about an estate by means of bird food? 



