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yes, all animals yawn for one reason or another. We do it to stretch our jaws and if we're not getting enough oxygen into our blood which happens for some reason when we're tired IIRC.
It is adorable when they yawn! Except when vipers yawn, it can be scary because they fully extend the fangs and stretch them. It is often the best view you'll ever get of the fangs though!
It is adorable when they yawn! Except when vipers yawn, it can be scary because they fully extend the fangs and stretch them. It is often the best view you'll ever get of the fangs though!
That's gotta be one of the coolest things to see in person.