Tail shaking.

[Iosevus]

Just curious if this means anything?
On occasion she will shake her tail back and forth very fast for a brief moment.. ends up sounding like humming bird wings.

[michael]

I'm thinking its either to help relieve a bit of tension, or to get their feathers back in order. .......:)

[Z28Taxman]

Ditto does that when I'm about to open the cage, he gets all excited, fluffs up, then shakes his tail. After that he starts doing his let me out dance.