Is this a Happy Dance? Testing his environment? Mouth open, tongue and throat undulating..

[JKav]

I'm wondering what this behavior means. I thought before she was testing her environment.
But this time she was very happily giving herself a "dust bath", practically rolling around in her blanket when she started..

Mouth open, tongue "wagging", no sound - is this like a dog sniffing?

 

[dc3085]

Usually when a quail leaves it's mouth open it is hot and trying to pant to cool off. Other reasons are seeds stuck in the throat, yawning, ears popped cause a plane flew over or worms.