What is the purpose of bells when attached to a bird?

The purpose of bells when attached to a bird is primarily to indicate the bird's location. In falconry, when a bird of prey is released to hunt, it can fly long distances at high speeds, making it difficult for a falconer to keep track of its whereabouts. The sound of the bells helps the falconer to locate the bird, especially in areas where visibility may be poor or when the bird is out of sight. This auditory cue allows the falconer to maintain awareness of the bird’s movements and to effectively manage its return and overall activity in the field.

The other options do not accurately capture the primary function of bells in falconry. While birds may exhibit specific behaviors related to mating or hunting, bells are not intended for scaring off prey, enhancing speed, or indicating mating readiness. Their primary role is for tracking the location of the bird, which is essential for effective falconry practices.