What is the practice of using a live creature, let out freely or restrained, for the hawk to chase referred to as?

The practice of using a live creature, whether let out freely or restrained, for the hawk to chase is referred to as "bagged quarry." This term specifically highlights the use of a live animal, often a small bird or rodent, as a target for the hawk during training. The goal is to simulate the hunting experience and allow the hawk to engage in its natural hunting behaviors, which is essential for developing its skills.

In contrast, the other options refer to different concepts within falconry. Controlled hunting typically involves a structured environment where hunting is conducted in a manner regulated by the falconer, but it does not specifically refer to the use of a live creature as a target. Training flight generally describes the practice of flying the bird in a controlled manner, not focusing on using a live quarry. Flush hunting involves flushing out game from underbrush for the hawk to pursue, which is a different technique than the direct use of bagged quarry. The term "bagged quarry" specifically encapsulates the essence of utilizing a live animal in a way that directly enhances the hawk's training regimen.