They are a group bird and have a large range of displays from screams and whistles to grunts and bill clapping .
They make many different kinds of noises , such as screams , whistles , grunts and bill clapping .
They make many different kinds of noises , such as screams , whistles , grunts and bill clapping .
让句子变得简单: They are a group bird and have a large range of displays from screams and whistles to grunts and bill clapping . 输出: