Which raptor is least likely to build its own nest?

The Jack, also known as the Jackdaw, is least likely to build its own nest compared to the other options. This is primarily because Jackdaws often prefer to take advantage of existing structures for nesting, such as cliffs, tree cavities, or even human-made buildings. They exhibit behaviors that show a tendency to utilize sites that offer protection and may not invest the energy required to create a nest from scratch, which is a common practice among many raptors.

In contrast, the other raptors listed, such as the Red-tailed Hawk and Marsh Hawk, actively seek out or construct their own nests as part of their reproductive behavior. These species are more likely to build nests made of sticks, grasses, and other materials in high places to ensure safety for their young. The Musket, while lesser-known, also adheres to traditional nesting practices typical of birds of prey, being involved in creating and maintaining their own nests.

Thus, the Jack's preference for utilizing existing structures rather than building nests is what makes it the least likely to engage in nest construction among these options.