This article has multiple issues. Please help improve it or discuss these issues on the talk page. (Learn how and when to remove these template messages)(Learn how and when to remove this template message)
The pant-hoot is one of the best known and studied of the vocalizations of chimpanzees. This call begins with breathy, low-pitched hoots that makes a transition into a series of quicker, higher-pitched in-and-out pants. Finally the pant-hoot builds to a loud climax.
This loud vocalization is used by chimpanzees at apparently any opportunity where they feel it is appropriate to express their excitement. Chimpanzees pant-hoot in a variety of different circumstances and situations, such as arriving at fruit trees, when joining and greeting other members of their community, and when traveling. They often listen to distant pant-hoots made by other chimps and respond to them. These sounds may serve as identification, but they occur in such a wide variety of circumstances and with enough subtle variations that they may carry other meanings as well.
Both male and female chimpanzees make the pant-hoot call. High-ranking adult males pant-hoot most frequently. The females sometimes produce pant-hoots on their own and often join in a chorus of pant-hoots when others around are calling. The males' and females' pant-hoots sound different, and it is even possible for humans (with a little practice) to distinguish between the calls of two different chimpanzee individuals. Pant-hoot styles vary among different populations of chimps.