Rove beetle

from WordNet (r) 3.0 (2006)

rove beetle
    n 1: active beetle typically having predatory or scavenging
         habits

from The Collaborative International Dictionary of English v.0.48

Rove \Rove\, n.
   The act of wandering; a ramble.
   [1913 Webster]

         In thy nocturnal rove one moment halt.   --Young.
   [1913 Webster]

   {Rove beetle} (Zool.), any one of numerous species of beetles
      of the family {Staphylinidae}, having short elytra beneath
      which the wings are folded transversely. They are rapid
      runners, and seldom fly.
      [1913 Webster]