stridulating

Verb

stridulate (third-person singular simple present stridulates, present participle stridulating, simple past and past participle stridulated)

1. (intransitive) To make a high-pitched chirping, grating, hissing, or squeaking sound, as male crickets and grasshoppers do, by rubbing certain body parts together.
   • A window was open, and the crickets were stridulating at an ominous speed in the black motionless foliage.1969, Vladimir Nabokov, Ada or Ardor, Penguin, published 2011, page 191

   Synonyms:

   chirp, chirr