What function do bells serve when attached to a hawk?

Bells attached to a hawk serve primarily to indicate movement. When a falconer places bells on a hawk's legs, the sound produced during the bird's movement helps the falconer track its location and activity, especially when the hawk is flying or hunting. This auditory cue is essential for maintaining awareness of the bird's actions in the field, allowing the falconer to adjust their strategies accordingly.

Other potential functions of bells, such as attracting other birds or signaling the owner, do not align with the primary purpose as effectively. While bells may produce sound that other birds hear, that is not their main function. Additionally, although bells can provide an indication to the falconer, it is the movement tracking aspect that is paramount in practical falconry. The notion that bells could protect feathers is not relevant, as their design and purpose focus on communication rather than physical protection for the bird.