 These locational calls are either a high-pitched series of one to three "caw" or "hi" sounds, or a series of longer "caw" sounds with a nasal "aaa" element to the call; the latter call may be used exclusively between mated pairs.Alarm calls are a rapid series of sharp "caw"s. The birds also make a variety of squalling, guttural sounds, which may be done either quietly or excitedly.These sounds are typically accompanied by activities such as the ripping of leaves or the hammering of branches, and may serve as part of courtship or pair bonding.