What term is used to refer to the tail feathers of a hawk?

The term used to refer to the tail feathers of a hawk is "train." In avian terminology, the "train" specifically describes the group of feathers at the rear of a bird, which provides essential functions such as balance and maneuverability during flight. The train consists of a series of elongated feathers that are critical for stabilizing the bird in the air and aiding in braking during landing.

The other options do not accurately describe the tail feathers in the context of hawks or birds in general. "Tail" is a more general term, while "plume" usually refers to a decorative feather or a cluster of feathers, and "fan" may describe the arrangement of feathers but is not used to refer specifically to the tail feathers of birds. Understanding the specific terminology helps in accurately communicating about avian anatomy and contributes to a greater comprehension of falconry practices.