What is a "haggard" in the context of falconry?

In falconry, a "haggard" refers to an adult raptor that has reached maturity and is in full plumage. This term specifically denotes birds that have completed their first molt and are often experienced hunters in the wild. The distinction is important because haggards are typically more knowledgeable and skilled in their hunting abilities compared to younger birds, like the eyasses, which are still learning to fly and hunt. Understanding the stage of development a bird is in helps falconers better prepare for training and handling, as adult birds might have different temperaments and requirements compared to younger raptors.