Which of the following raptors does not fit with the others?

The term "musket" refers specifically to a male kestrel, typically a designation used for that species in falconry. In contrast, "jack," "jerkin," and "tiercel" are all terms that describe male raptors, but they apply to different species and contexts within falconry.

"Jack" often refers to a small male hawk, particularly in the context of sparrowhawks or other small accipiters. "Jerkin" is another term used for a small male falcon, and "tiercel" is commonly used to denote a male falcon in general, often associated with larger species such as peregrines or gyrfalcons.

Therefore, the "musket" stands apart from the others, as it is specifically linked to the kestrel, whereas the other terms are more generalized descriptors for male birds of different species. Understanding these distinctions is essential for identifying raptors as well as for effective falconry practices.