PROBLEM 1. The Kinds of Anv/Jials of the Earth 



25 



Fig. 28 Carolina Wren 



Fig. 29 Sierra Jiinco 



The birds of Figures 28, 29, 30, and 32 are called 

 perching birds. What do these birds eat? How 

 are they helpful to man? What can we do to 

 protect thefn? The birds that built the nests of 

 Figure 5/ are also helpfid. Can you find out 

 why? (Fig. 28, HUGH davis; Fig. 2p, nature mag- 

 azine; Figs. 50, 5/, and 32, American museum 

 OF natural history) 



J- 

 Fig. 31 Nests of the cliff swallow 



Fig. 30 Chickadee 



Fig. 32 Hummingbird 



