What does the term 'unsummed' refer to regarding a hawk?

The term 'unsummed' refers specifically to a hawk that has not yet replaced its feathers, which means it still has its original plumage. This is an important aspect of a hawk's development and health because the molting process, when feathers are shed and new ones grow in, is crucial for maintaining flight efficiency and overall well-being. An unsummed hawk is typically in a state of transition and may not be in peak condition for hunting or training. This term distinguishes hawks still in their natural feathering from those that have undergone molting and are more suited for falconry activities. Understanding this term is critical for falconers, as they must be aware of a bird's physical condition and readiness for training and hunting.