Which hawk is known for attacking intruders near its nest site?

The Goshawk is well-documented for its aggressive behavior, particularly during the breeding season when it is defending its nest site. These birds are known to exhibit boldness and ferocity toward intruders, including humans, other birds, and animals that venture too close to their nest. This behavior is primarily driven by the instinct to protect their young and nesting territory, making them one of the more temperamental raptors in terms of nest defense.

In contrast, while the other options like the Prairie Falcon, Harris' Hawk, and Red-tailed Hawk can also defend their nests, they do not exhibit the same level of aggression or are not as universally noted for this trait as the Goshawk. The Prairie Falcon is more associated with open habitats and is generally less aggressive regarding nest defense. Harris' Hawks are noteworthy for their social structures and hunting in groups, rather than particularly aggressive behavior at their nest sites. The Red-tailed Hawk, while territorial, is not famed for its ferocity compared to the Goshawk when it comes to defending a nesting area.