churr

In different parts of this kingdom people call them fen-crickets, churr-worms, and eve-churrs, all very apposite names.

They were cutting the grass on the tennis court below; he heard the soft churr of the mower.

Only a cricket from time to time gave a cautious churr, and a mouse was scratching somewhere; he could hear his own breathing.

From twilight till grey does the fern-owl "churr" and fly through the night.