What does the shape of a falcon's nostrils help with during high-speed dives?

The shape of a falcon's nostrils is specifically adapted to reduce turbulence and prevent shock waves as the bird enters a high-speed dive. This aerodynamic design allows air to flow smoothly through the nostrils, minimizing drag and the effects of rapid air pressure changes experienced during diving. By reducing shock waves, the falcon can maintain better control over its flight and avoid disruptions in breathing, which is crucial when reaching high speeds. This adaptation demonstrates an evolutionary response that enhances the bird's hunting capabilities and overall efficiency while diving.

Other options, while they might seem plausible, do not accurately reflect the primary function of the nostril shape in relation to high-speed dives.