chirrup

It rose again—it was like a perplexing cheep and chirrup, changing to a chortle of glee.

Firmly resolved even in that event to force Czar in, I clung closer to him with my knees and gave him a cheery chirrup.

The cricket had stopped his chirrup in the kitchen, and no mouse stirred in the slumbering house.

A grasshopper began to chirrup by the wall, and like a blue thread a long thin dragon-fly floated past on its brown gauze wings.

"Sparrow-hawks don't sing very sweetly; they chirrup and whistle," Piers interrupted.