When she's simply wandering around, her tail goes into indicator mode. If she's standing still thinking, or looking, or eating, The Tail points straight back in line with her body. When she decides to move, The Tail points in the direction she's going to move. She's obviously read the Highway Code - indicate first, then manoeuvre.
|Titian signalling a left turn|
It will be interesting to see what happens if she ever moults all her tail feathers, like Fizz has done this year. How will she know which way to turn?