Do animals yawn?
Humans yawn. A yawn is the action of opening the mouth wide to take a deep breath, which is usually involuntary and taken when tired or bored.
Mammals yawn. Mammals, such as dogs, cats, tigers, lions, apes, monkeys, and pigs yawn. A human is a mammal too.
Scientists also think that birds, reptiles, and even some fish also yawn.
Photographer: Martina Nicolls
Martina Nicolls: SIMILAR BUT DIFFERENT IN THE ANIMAL KINGDOM