Why does a falcon have hard lumps in its nostrils?

The hard lumps in a falcon's nostrils, known as "tubercles," serve to regulate airflow and filter out debris while the bird is in flight. They help prevent dust and small particles from entering the respiratory system, which is crucial for maintaining healthy lungs during high-speed pursuits. Additionally, these structures can aid in thermoregulation, helping the falcon manage the temperature of the air it breathes.