Source : Webster's Revised Unabridged Dictionary (1913)

Insectivore \In*sec"ti*vore\, n.; pl. {Insectivores} (-v[=o]rz).
   [F.] (Zo["o]l.)
   One of the Insectivora.

Source : WordNet®

insectivore
     n 1: small insect-eating mainly nocturnal terrestrial or
          fossorial mammals
     2: any organism that feeds mainly on insects