Churr"ing

from The Collaborative International Dictionary of English v.0.48

Churr \Churr\, v. i. [imp. & p. p. {Churred}; p. pr. & vb. n.
   {Churr"ing}.]
   To make a churr, as a cockchafer.

         That's the churring of the nightjar.     --Hall Caine.
   [Webster 1913 Suppl.]