Something older than the old ones, and everybody's tail is twitching.

We got a net around it, and its tail was still twitching!

The dragon didn't say anything at all the whole time I was talking, but its tail twitched a couple of times.

Niles stopped, and looked at her, thinking, his tail twitching.

His tail twitched spasmodically behind him as though he didn't know what to do with it.

She made the smaller jump down onto the surface of the roof, looked around again, her tail twitching.

If he'd been in lion form, his tail would have been twitching.

Rhiow looked down at the gravel where she sat, her tail twitching.

Dulcie stood still, watching him, the tip of her tail twitching.

Like something supine waiting to spring, with just the tip of its tail twitching.