What is a cadge used for in falconry?

A cadge is specifically designed for transporting a bird to the field. In falconry, it serves as a portable perch that allows the bird to rest securely while being carried. This is crucial when heading to a hunting site, as it keeps the hawk safe and comfortable during travel. The structure of a cadge allows for the proper positioning of the bird, ensuring it is neither confined too tightly nor exposed to hazards while in transit.

The other options may describe important aspects of falconry equipment or practices but do not define the primary function of a cadge, which is transport. For instance, restraining a bird could involve different equipment, and training exercises would typically use different types of perches or setups. Similarly, a cadge does not play a role in directing transmitter signals, which is the purpose of specialized tracking equipment.