The unique technique in parrots also exhibits “longer-than-expected” pendular movement, similar to the ... Representative diagram showing beakation in parrots (Royal Society Open Science ...

But what exactly causes this? One of the causes is the spontaneous back-and-forth movement of the eye, called 'pendular nystagmus.' This phenomenon not only makes seeing difficult but also hinders ...

The unique technique in parrots also exhibits “longer-than-expected” pendular movement, similar to the swinging method used by gibbons, but in a slower and more careful nature, they say. In the ...