25 Yawning Animals

Most of the times opening the mouth is a reflex, called yawn, and has different causes. Fatigue, boredom, stress, sleepiness or others yawning (mirror neuron reflex) are usually thought to be in its origin but there are a few theories about it.

  • yawning occurs when one's blood contains increased amounts of carbon dioxide and needs oxygen (or expulsion of carbon dioxide) that a yawn can provide.
  • yawning is the body's way of controlling brain temperature, needed to increase brain activity.
  • yawning, especially "contagious" yawning, may be a way of keeping a group of animals alert and signals tiredness to other members of the group in order to synchronize sleeping patterns and periods.

In animals, yawning can serve as a warning signal to enemies like in baboons, siamese fighting fish and guinea pigs.

The "contagious" yawning can occur across species the reason why you can see your dog or cat yawn after you.

Below are 25 funny images of animals being caught with mouths wide open.

Yawning cat.
Yawning cat. | Source
Yellow-legged gull (Larus michahellis). Photo taken on the top of the basilica of Nossa Senhora do Pilar, Gaia, Portugal
Yellow-legged gull (Larus michahellis). Photo taken on the top of the basilica of Nossa Senhora do Pilar, Gaia, Portugal | Source
A Namaqua chameleon in threat display, Namib desert, Namibia.
A Namaqua chameleon in threat display, Namib desert, Namibia. | Source
Closeup of mature Red Deer stag (Cervus elaphus) bellowing during the rut.
Closeup of mature Red Deer stag (Cervus elaphus) bellowing during the rut. | Source
Helarctos malayanus, Shanghai Zoo. The sun bear (Helarctos malayanus) is a bear found in tropical forest habitats of Southeast Asia.
Helarctos malayanus, Shanghai Zoo. The sun bear (Helarctos malayanus) is a bear found in tropical forest habitats of Southeast Asia. | Source
Gymnothorax nudivomer The starry moray is a large sized fish that can reach a maximum length of 180 cm. One its characteristics is the yellow color of its inside mouth.
Gymnothorax nudivomer The starry moray is a large sized fish that can reach a maximum length of 180 cm. One its characteristics is the yellow color of its inside mouth. | Source
A yawning American alligator (Alligator mississippiensis), Collier county, Florida.
A yawning American alligator (Alligator mississippiensis), Collier county, Florida. | Source
A swallow drinking while flying over a swimming pool
A swallow drinking while flying over a swimming pool | Source
Southern Elephant Seal (Mirounga leonina)  in South Georgia.
Southern Elephant Seal (Mirounga leonina) in South Georgia. | Source
Ostrich, beak open
Ostrich, beak open | Source
Siberian Tiger Yawning
Siberian Tiger Yawning | Source
Hippo with mouth wide open
Hippo with mouth wide open | Source
A Namaqua chameleon in threat display, Namib desert, Namibia.
A Namaqua chameleon in threat display, Namib desert, Namibia. | Source
Basking shark (Cetorhinus maximus).
Basking shark (Cetorhinus maximus). | Source
At the British Wildlife Centre, Newchapel, Surrey; 'Pickles' the vixen lets out a huge yawn.
At the British Wildlife Centre, Newchapel, Surrey; 'Pickles' the vixen lets out a huge yawn. | Source
The Giant Leaf-tailed Gecko (Uroplatus fimbriatus) is easily observed on the island of Nosy Mangabe in the Bay of Antongil off Maroansetra. When alarmed, it opens its mouth largely, displaying its brilliant orange-red interior.
The Giant Leaf-tailed Gecko (Uroplatus fimbriatus) is easily observed on the island of Nosy Mangabe in the Bay of Antongil off Maroansetra. When alarmed, it opens its mouth largely, displaying its brilliant orange-red interior. | Source
Koala, ZooParc de Beauval, Saint-Aignan, Loir-et-Cher, France
Koala, ZooParc de Beauval, Saint-Aignan, Loir-et-Cher, France | Source
Japanese macaque (Macaca fuscata) juvenile yawning at Jigokudani Monkey Park, Nagano, Japan.
Japanese macaque (Macaca fuscata) juvenile yawning at Jigokudani Monkey Park, Nagano, Japan. | Source
The nest and chicks of an Australian Pipit Anthus australis
The nest and chicks of an Australian Pipit Anthus australis | Source
A big brown bat, Eptesicus fuscus.
A big brown bat, Eptesicus fuscus. | Source
BIG mouth
BIG mouth | Source
Also Yorkies have teeth ....
Also Yorkies have teeth .... | Source
Basking shark (Cetorhinus maximus).
Basking shark (Cetorhinus maximus). | Source
 A male lion at a zoo yawning. Some of its teeth are visible.
A male lion at a zoo yawning. Some of its teeth are visible. | Source
A yawning horse in Norway
A yawning horse in Norway | Source

Cute animals yawning

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