Source : Webster's Revised Unabridged Dictionary (1913)

Insectivorous \In`sec*tiv"o*rous\, a. [See {Insectivora}.]
   Feeding or subsisting on insects; carnivorous. The term is
   applied:
   (a) to plants which have some special adaptation for catching
       and digesting insects, as the sundew, Venus's flytrap,
       Sarracenia, etc.
   (b) to the Insectivora, and to many bats, birds, and
       reptiles.

Source : WordNet®

insectivorous
     adj : (of animals and plants) feeding on insects [ant: {carnivorous},
            {herbivorous}, {omnivorous}]