Which type of raptor molts its outermost primary feather first?

The correct answer aligns with the understanding of raptor feather molting patterns. In general, raptors follow specific molting sequences, and the norm is that accipiters, such as hawks, tend to lose their outermost primary feather last, while buteos and falcons may exhibit different molting habits.

Typically, the outermost primary feather is replaced last, which is part of a systematic process to ensure that the bird maintains adequate flight capability during the molt. Each group of raptors may vary in their molting patterns, and only a species-specific study would clarify the precise order of feather loss.

The answer "D. None of the above" is thus correct, indicating that no listed groups follow the pattern described in the question. Understanding the nuances of feather molting in different raptor families is crucial for studying their biology and behavior effectively.