What is a traditional instrument used to stop hawks from bating?

The traditional instrument used to stop hawks from bating is the brail. Brails are a type of strap or line attached to the hawk's leg that connects to the jesses, preventing the bird from flying away and helping to keep it secure while still allowing some movement. This is particularly crucial during training and handling, as it reduces the risk of the hawk becoming frightened and taking flight in an uncontrolled manner.

In contrast, the other options serve different purposes in falconry. A creance is a long line used for training a hawk to fly short distances while remaining tethered to a trainer, providing control during initial training sessions. Braces are used to attach a hawk to a perch or a cadge, which serves as a type of transport or holding device for birds. While each of these items plays an important role in the practice of falconry, the brail specifically addresses the need to keep a hawk calm and contained during periods when flights or bating might occur.