If a falconer observes a bird making a vigorous shake of its body, what is this action called?

The action of a bird making a vigorous shake of its body is known as rousing. This behavior serves several purposes; it helps to relax and invigorate the bird, allows it to shake off debris or loose feathers, and can also be a way to redistribute oils from the preen gland throughout the feathers, which is essential for maintaining feather health and insulation.

In contrast, feaking refers to the behavior of a bird rubbing its beak on a perch, often to clean its beak after feeding. Preening involves the bird meticulously grooming its feathers to keep them in good condition and free from parasites. Bating, on the other hand, is a term used to describe a hawk's agitated attempts to escape when tethered or when it feels threatened, which is different from the shaking behavior associated with rousing.