Which raptor is least likely to build its own nest?

The choice of Jack as the raptor least likely to build its own nest is supported by its behavioral habits. Many birds of prey, including some species like the Jack, tend to seek out existing nests built by other birds. This behavior is often referred to as "nest parasitism," where the bird will take over or use the nests of larger birds, which typically have the structural integrity needed to support their eggs or young.

In contrast, raptors like the Red-tailed Hawk are known for their ability to construct sturdy nests, typically high in trees or on cliffs, using various materials such as sticks, leaves, and grass. These species demonstrate a strong instinct for nest building, which is necessary for rearing their chicks safely away from predators.

Muskets and Marsh Hawks also display nesting behaviors specific to their species, often selecting locations and building nests that suit their hunting and breeding needs. The Jack, however, does not engage in such behaviors as frequently, making it the least likely to build its own nest among the options provided.