What is the main function of a swivel in falconry equipment?

The main function of a swivel in falconry equipment is to prevent equipment failure. A swivel ensures that the leash or tether attached to the falcon does not twist and become tangled while the bird is in flight. This is crucial for both the safety of the bird and the effectiveness of the equipment. If the tether were to get twisted, it could potentially lead to the bird becoming restricted in its movement, which could affect its ability to fly, hunt, or return to the falconer safely.

Swivels allow for free movement and rotation, which help maintain the integrity of the connection between the bird and its equipment. This is particularly important during various activities such as hunting or exercising, where the falcon may make sudden movements or turns.