AVES (THE BIRD) 



Follow the plan for Pisces, p. 112. 

 Compare birds and reptiles. 



How do you account for the presence of feathers on the bird? 

 For the bird's ancestors, see your geology, Archseopteryx. 

 See Chapman's ''Bird Life" for a plan for spring or fall 

 study of birds. 



STUDY OF LIVE BIRDS 



A. General Study 



1. Winter Birds. 



(1) Make a list of all the birds which remain in your 



locaUty through the winter. 



(2) Are they more warmly clad than the birds which go 



south in winter? 



(3) Why do they not migrate? 



(4) What is their food? Can they get a comfortable sup- 



ply in winter? 



2. Migration. 



(1) What birds are the first to migrate? 



(2) What ones are the last to go? 



(3) What ones are the first to come back in the spring? 



DonH guess. Keep a record, giving the date for the 

 first time you see each bird as it returns in the spring. 

 Make several trips to the woods and streams to in- 

 crease the list. 



(4) Which birds are gregarious? 



(5) Which come in pairs? 



(6) Can you give any evidence from your own observation 



of any birds returning to the same place to nest from 

 year to year? 



3. Movements on the Ground. 



(1) Make a list of the birds that hop. 



(2) Make a list of those that walk. 



174 



