Distribution of 

 N.A.MUSKRATS 



NORTH AMERICAN MUSKRATS 



Their distribution and species according to Hollister. The muskrat is indigenous 

 only to North America, being found nowhere else in the world. The Louisiana 

 muskrat is the most southerly form and the most abundant. Only three species are 

 scientifically recognized, the common muskrat, which has twelve geographic forms 

 or sub-species; the muskrat found in the southern part of Newfoundland, and the 

 Louisiana species, which is also sparingly found in Texas and Mississippi. lheir 

 common and scientific names, with the key to their distribution on the chart 

 above, are: , . c 



I. Common American muskrat (Fiber zibethicus). 2. Labrador muskrat {Jr. z. 

 aquilonius). 3. Middle Atlantic coast or •'black' - muskrat. (F. z. macrodon). 

 4. Great Plains muskrat (F. z. cinnanominus) . 5. Hudson Bay muskrat (F. z. albus). 

 6. Northwestern muskrat (F. z. spatulatus). 7. Alaska Peninsula muskrat (F. z. 

 zalophus). 8. Rocky Mountain muskrat ( F. z. osoyoosensis) . 9 Oregon Coast 

 muskrat (F. z. occipitalis). !0. Nevada muskrat (F. z. mergens). 11. Arizona musk- 

 rat (F. z. pallidus). 12. Pecos Valley muskrat (F. z. ripensis). 13. Newfoundland 

 muskrat (Fiber obscurus). 14. Louisiana muskrat (Fiber rivalicius). 



