xxiv 



INDEX. 



Woodpeckers, why are their sup- 

 posed ravages beneficial ... 797 



Woodpeckers, why are the ex- 

 tremities of their tails hard and 

 elastic 789 



Wren, why does it make several 

 nests 698 



Wren, why associated with the 

 redbreast 703 



Wren, why are the toes of golden- 

 crested, fastened by a skin ... 7 IP 



Wry-neck, why so called 828 



Youth, why is the human body 

 soft and round 39 



Zebra, why found in hilly and 

 mountainous places 505 



Zebra, beautiful form and colours 5M 



