Which genus includes eight species of longwings in North America?

The genus that includes eight species of longwings in North America is Falco. This genus is well-known for comprising various species of birds of prey, particularly falcons, which are characterized by their long wings and exceptional agility in flight. The longwings have a reputation for their speed and hunting prowess, making them fascinating subjects of study in both falconry and birdwatching.

In contrast, the other genera listed, such as Accipiter, Aquila, and Milvus, include different types of raptors but do not specialize in the longwing species associated with falcons. For instance, Accipiter includes hawks that generally have shorter wings tailored for maneuverability in wooded environments, while Aquila is known for larger eagles that exhibit different hunting styles and habitats. Milvus generally refers to kites, which also feature different adaptations and characteristics. Thus, Falco stands out as the genus specifically noted for its long-winged species in North America.