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to create certain vocalizations in order to communicate, scare off rivals (to proclaim territory or dominance), and to locate and attract a mate. The gular sac in this instance amplifies their voice to be heard louder and seemingly closer. Some species of
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130 million years ago, also had a gular pouch, similar to the pelican after which it is named.
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to have this characteristic, where it is only present in males. In addition, the
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Gular skin can be very prominent, for example in members of the order
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66:"Gular skin"
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49:Please help
44:verification
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205:gular pouch
149:featherless
145:ornithology
135:frigatebird
400:Categories
355:References
291:gular fold
278:amphibians
227:throat sac
212:cormorants
173:gular fold
141:Gular skin
77:newspapers
18:Throat sac
282:vocal sac
262:great ape
258:orangutan
223:gular sac
169:vocal sac
384:July 29,
338:Air sacs
332:See also
305:dinosaur
302:theropod
238:anhingas
201:pelicans
179:In birds
153:mandible
107:May 2010
274:siamang
234:gannets
187:A male
155:of the
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287:lizard
270:gibbon
266:walrus
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