Reptiles Yawn!

Reptiles Yawn Too!
As humans, we are all familiar with yawning however did you know that reptiles also yawn? It’s true that reptiles, birds, and of course mammals all yawn. Brain chemicals called neurotransmitters are responsible for this behaviour and some neurotransmitters, act in the hypothalamus can induce and control yawning such as nitric oxide and dopamine.