What is the scream of the pigeon

The scream of the pigeon is usually gurgling, and the sound is lighter when the estrus.Usually, they will not call again after they are successfully paired.They are gurgling when they are frightened. Such a pigeon who just arrives at home will appear.At this time, don't disturb them, let them raise them for a few days, and it will be better to adapt slowly.In addition, they may also grun when they are sick.