Stridulation

from WordNet (r) 3.0 (2006)

stridulation
    n 1: a shrill grating or chirping noise made by some insects by
         rubbing body parts together

from The Collaborative International Dictionary of English v.0.48

Stridulation \Strid`u*la"tion\, n.
   The act of stridulating. Specifically: (Zool.)
   (a) The act of making shrill sounds or musical notes by
       rubbing together certain hard parts, as is done by the
       males of many insects, especially by Orthoptera, such as
       crickets, grasshoppers, and locusts.
   (b) The noise itself.
       [1913 Webster]

   Note: The crickets stridulate by rubbing together the strong
         nervures of the fore wings. Many grasshoppers
         stridulate by rubbing the hind legs across strong
         nervures on the fore wings. The green grasshoppers and
         katydids stridulate by means of special organs at the
         base of the fore wings.
         [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

20 Moby Thesaurus words for "stridulation":
      animal noise, bark, barking, birdcall, call, chirk, chirking,
      chirp, chirrup, clang, creak, crick, cry, grunt, howl, howling,
      mating call, note, ululation, woodnote