Brown Rat: House Rat Rattus nori'e(/icus 



As winter approaches, the jumping mouse retires 

 to a spherical nest of leaves and grass which is placed 

 below the frost line. In the nest the creature curls up 

 and sleeps until Spring returns. 



The House Rat: Norway Rat: Brown Rat: 

 Gray Rat: Wharf Rat: Barn Rat 



Ratius norvecjicus 



Certainly the common rat is the most detested of 

 native animals. The damage done by it amounts to 

 millions of dollars annually and it seems that nothing 

 escapes its destructive ravages. Every sort of foodstuff, 

 flooring, hot house plants, hulls of ships, insulation on 

 electric wires, lead pipes, books, clothes, grains, field 

 crops, chickens, birds' eggs, and even little pigs, are 

 destroyed by it. In addition to causing great damage to 

 these and other things, the rat spreads fleas, filth and 

 disease. It is very prolific, having several litters of 

 from eight to fourteen young each year. The common 

 rat is not a native of the United States, but was intro- 

 duced years ago, having been brought here in ships. 

 It is now quite generally distributed over the world 



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