In which species of longwing is there sexual dimorphism regarding coloration and pattern?

The American kestrel is known for exhibiting sexual dimorphism, which refers to differences in coloration and pattern between male and female individuals of the same species. In the case of the American kestrel, males typically have more vibrant and colorful plumage, often showcasing a bluish-gray head, and rufous-colored wings and back. Females, on the other hand, generally have a more muted brown coloration with streaks, making them less conspicuous. This dimorphism is beneficial, as the more colorful males can attract mates, while the camouflaged females can better hide from predators while nesting and raising their young.

In contrast, the other species mentioned do not exhibit this level of sexual dimorphism in their coloration and pattern, as both males and females of those species usually show more similar plumage characteristics. Thus, the American kestrel stands out in this regard, making it the correct answer to the question.