ethologist

from WordNet (r) 3.0 (2006)
ethologist
    n 1: a zoologist who studies the behavior of animals in their
         natural habitats
    
from The Collaborative International Dictionary of English v.0.48
Ethologist \E*thol"o*gist\n.
   One who studies or writes upon ethology.
   [1913 Webster]
    

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