What does the term "tethering ring" refer to in relation to a bow perch?

The term "tethering ring" specifically refers to a ring attached to a bow perch that is used to secure the bird in place. This is essential in falconry as it allows the handler to safely and effectively restrain the bird while it is on the perch, preventing it from flying away or getting injured. By tethering the bird, the handler can ensure that the bird is secure during training sessions or while being cared for.

In contrast, the other options do not accurately describe the function or purpose of a tethering ring. Measuring a bird’s flight distance or helping in training young birds involves different equipment and methods not related to the physical restraint provided by the tethering ring. Similarly, a decoration would not have a functional role in the context of falconry practice or training. Hence, the definition that aligns with the purpose of the tethering ring is that it is a secure means of keeping the bird in place on the bow perch.