What is the term for a peregrine falcon in adult plumage?

The term for a peregrine falcon in adult plumage is commonly referred to as a "Blue hawk." In this context, the term "blue" describes the slate-blue coloration of the upperparts that characterizes adult peregrine falcons. This distinctive plumage is a key feature for identification, setting adult peregrines apart from their juvenile counterparts, which have different coloration patterns. The term reflects both the appearance and the classification of the bird, emphasizing the importance of accurate terms in the study and practice of falconry. The other options do not accurately represent the adult plumage of the peregrine falcon.