Coo [verb]

He soon sends them flying back to their house on the roof, where they chatter and coo in great excitement.

About half-past three, the doves began to coo, and that made the monkey sit up and listen.

I'm the oldest girl at Miss Waring's—locked up there with a lot of little pigeons that coo every time you look at them.

We were now about one hundred and fifty yards away, and I suddenly leapt to my feet and coo-eed several times.

Arrived there, she stopped for breath for a while, and then sent forth a long "Coo-ie."

Te-ah-ke-ra-le-re-coo, the Chayenne; a fine-looking fellow, with a pipe in one hand and his whip in the other.

Coo-coo-coo, the Owl; a very old and emaciated Chief; sits smoking a handsome pipe.

His face were like nowt earthly; and he had bristling hair, and great horns like a coo.

Some breeds of domestic Pigeons coo in a new and quite peculiar manner not manifested in their wild state.

He coo-eed and waved his hand, and Bobby, looking round, turned his horse and rode to meet him.