What is the correct sequence for molting the primary wing feathers in Buteo, Parabuteo, and Accipiter?

The correct sequence for molting the primary wing feathers in birds of the genera Buteo, Parabuteo, and Accipiter is that it starts with the inner most primary feather and proceeds to the outermost primary. This pattern is observed as part of the bird's natural molting process, which is essential for maintaining the health and functionality of the feathers.

Molting from the innermost to the outermost primary feathers allows for a more gradual adaptation to changes in flight dynamics and feather condition. The inner feathers are critical for flight mechanics as they contribute to lift and control, meaning their timely replacement is crucial for the bird's performance in the air. By starting with the innermost feathers, the bird ensures that it maintains optimal aerodynamic function as it progresses through the molt.

Considering the other options, starting with the outermost primary would disrupt the bird's balance and flight immediately, as those feathers play a critical role in stability. Molting from a specific feather and proceeding in both directions is less typical and could lead to asymmetry in flight. An irregular molting pattern, even if consistent across both wings, would not provide the orderly replacement necessary to retain efficiency in flight and overall feather health. Thus, the systematic approach from the inn