Chin is the forward pointing part of the lower jawbone that protrudes below the mouth. It’s different from just having a jaw, it’s a bony projection at the bottom of the face, a few animals have true chins, humans are unique among them.
1. Animals with large chin
🦍 1. Male Orangutans
Large throat sac flange below the chin not a bony chin but gives a massive lower-jaw appearance used to amplify vocal calls.
🐵 2. Mandrills and Baboons
Mandrills and Baboons have prominent lower jaw and fleshy chin area, their muzzles project outward giving a chin heavy look colorful and expressive lower face.
🐶 3. Bulldogs and Boxers
Bulldogs and Boxes undershot jaw lower jaw sticks out, looks like a pronounced, muscular chin visible when they rest.
🐐 4. Goats Bearded Males
Goats Beards hanging from the chin area make it look large sometimes used in dominance displays.
🦙 5. Llamas and Alpacas
Liamas and Alpacas fluffy fur can collect under the chin some appear to have a big soft chin pillow.
🐠 6. Some Fish Humphead Wrasse, Catfish
Catfish have fleshy barbels under their mouth that mimic a chin, Humphead wrasse has a large lower face and jaw bulge.
🐸 7. Frogs, Bullfrog
Frogs during vocalization, their throat pouch inflates, making a huge bulging chin.
🐘 8. Elephants
Elephants not a chin but their lower jaw and trunk base can look large and prominent, especially from the front view.
🧔 9. Humans
Humans are only species with a true bony chin, the chin is called the mental protuberance, no clear survival reason might be linked to speech, chewing forces.
🐮🐴10. Some Domesticated Animals
Pigs,horses sometimes appear to have a chin, but it’s not a true bony chin just lower jaw and flesh.
▪️Animals without chins
All non human mammals like lions, bears, elephants, all reptiles, birds, amphibians, and fish. They may have mandibles, lower jaws, but none with a forward projecting chin like humans.