Head Shaking?

[DevSun]

My lovebird shakes her head from side to side sometimes. It's not like bobbing her head, but shaking her head like people do when they nod no. Is this normal or is there something wrong?

 

[Cattoes7]

Lizzy does that when she has a pin feather by her ear

 

[Featherpaws]

ive seen munch do this when she is feeling territorial.