What is the technique called that involves cutting a broken feather and repairing it with another feather?

The technique referred to in the question, which involves cutting a broken feather and repairing it with another feather, is known as imping. This practice is essential in falconry and bird rehabilitation as it helps maintain the bird's ability to fly effectively. By using a compatible feather to replace the damaged one, the falconer ensures proper feather alignment and strength, which are critical for flight performance. Imping can help extend the life of a bird's feathers, especially during molting or following injury, allowing the bird to regain its full capabilities for hunting and maneuvering in flight. This technique underscores the importance of feather integrity in avian health and performance.