It's almost like The Mouth is saying "me, too!".... or something, in a sweet gentle way. Whatever it is, he wants you to notice, and this is a great sound to alert you, wake you up, or use as just a simple, natural ringtone.

The Mouth, a European Starling rescued as a fledgling, performs these sounds, no doubt much influenced by the science fiction soundtracks and other interesting sounds that have long been a part of his auditory environment.