Editing Brown bear (section)

===Communication===
{{listen
 |filename    = Yellowstone sound library - Grizzly Bear Eating - 003.mp3
 |title        = Brown bear sounds
 |description  = Brown bear sounds including huffing, jaw popping and growling
 |format       = [[Vorbis]]
 |filename2   = Yellowstone sound library - Grizzly Bear Eating - 002.mp3
 |title2       = Brown bear roars
 |description2 = Brown bears roaring over a carcass
 |format2      = [[Vorbis]]
}}

Several different facial expressions have been documented in brown bears. The "relaxed-face" is made during everyday activities, a face where the ears pointed to the sides and the mouth closed or slackly open. During social play, bears make "relaxed open-mouth face" in which the mouth is open, with a curled upper lip and hanging lower lip, and the ears alert and shifting. When looking at another animal at a distance, the bear makes an "alert face" as the ears are cocked and alert, the eyes wide open with the mouth is closed or only open slightly. The "tense closed mouth face" is made with the ears laid back and the mouth closed, and occurs when the bear feels threatened. When approached by another individual, the animal makes a "puckered-lip face" with a protruding upper lip and ears that go from cocked and alert when at a certain distance to laid back when closer or when retreating. The "jaw gape face" consists of an open mouth with visible lower canines and hanging lips while the "biting face" is similar to the "relaxed open-mouth face" except the ears are flattened and the eyes are wide enough to expose the [[sclera]]. Both the "jaw gape face" and the "biting face" are made when the bear is aggressive and can quickly switch between them.<ref name=Egbert>{{cite thesis |author=Egbert, A. L. |pages=30–35, 46 |year=1978 |title=The Social Behavior of Brown Bears at McNeil River, Alaska |publisher=[[Utah State University]] |degree=[[Doctor of Philosophy|Ph.D.]] |url=https://digitalcommons.usu.edu/etd/2101/ |access-date=25 April 2021 |archive-date=2 February 2024 |archive-url=https://web.archive.org/web/20240202162031/https://digitalcommons.usu.edu/etd/2101/ |url-status=live }}</ref>

Brown bears also produce various vocalizations. Huffing occurs when the animal is tense, while woofing is made when alarmed. Both sounds are produced by exhalations, though huffing is harsher and is made continuously (approximately twice per second). [[growling|Growls]] and [[roar]]s are made when aggressive. Growling is "harsh" and "[[guttural]]" and can range from a simple ''grrr'' to a rumble. A rumbling growl can escalate to a roar when the bear is charging. Roaring is described as "thunderous" and can travel {{convert|2|km|abbr=on}}. Mothers and cubs wanting physical contact will bawl, which is heard as ''waugh!, waugh!''.<ref name=Egbert/>