Which raptor does not fit with the others?

The term "Musket" refers specifically to a male hawk, particularly in the context of some species of falcons. The other terms—Jack, Jerkin, and Tiercel—also refer to male raptors, but they are used specifically in relation to certain groups of birds. For example, a "Jack" typically refers to a male sparrowhawk, while "Jerkin" refers to a male merlin, and "Tiercel" is a more general term for a male falcon.

The distinction lies in the specificity of the terms. While "Musket" is indeed a male bird, it does not have the same broad application as the others, which can apply to multiple types of birds within a taxonomic group. Thus, while all the terms are connected to male raptors, "Musket" stands out as it is less commonly used across different species, making it the one that does not fit as neatly with the others.