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      | Mammal Tracks and Sign | 
    
      | PorcupinePage 2 of 3 | 
    
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      | DENS | 
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 | Porcupines like to den up in small caves 
				in rocks. |  | 
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 | Or under fallen trees, if there is a 
				deep enough and secure enough hole. This was in a swamp. |  | 
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 | A classic typical Porcupine den. One can often tell that it's a 
				Porcupine den by the presence of porcupine scat immediately 
				outside the entrance. |  | 
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      | CHEWS | 
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 | Porcupines eat trees. They will often 
				spend days in a single tree, chewing, digesting, and releasing 
				scat, which can sometimes be found in considerable volumes 
				underneath a tree.    |  | 
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 | They will often simply sleep in the 
				tree, not coming to ground for several days. |  | 
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 | Porcupines are rodents, and as such, have two main 
				front teeth that continually grow. Gnawing wood wears them down. 
				Here are the teeth marks of a porcupine. Notice the similarity 
				between these marks and those of 
				beaver. |  | 
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      | HAIR | 
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 | A Porcupine hair. |  | 
    
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      | OTHER SIGN | 
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      | In spite of spending so much time in trees, porcupines sometimes fall 
		out of trees! Healed bone fractures are frequently found in porcupines. 
		The following photo shows what could be a fall site, where a porcupine 
		hit the ground. Note the shape of the compression in the snow, along 
		with the presence of quills. | 
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