Peregrine Falcons Reach 240 MPH in Hunting Dives

Peregrine falcons can exceed 240 miles per hour during hunting dives, making them the fastest animals on the planet. The birds weigh slightly more than a loaf of bread and have blue-gray feathers, dark eyes, and a hooked beak. Peregrines hunt other birds such as pigeons, ducks, shorebirds, and starlings.

They gain altitude, fold their wings, and drop into steep dives called stoops to intercept prey from above.

A 2018 study in PLOS Computational Biology found that stooping improves interception of evasive prey by changing pursuit geometry. The falcon makes continuous wing and body adjustments to maintain control at increasing speeds. Peregrines do not use these dives during ordinary flight. The maneuver is reserved for open-air attacks where speed and surprise provide advantage.

At speeds above 200 mph, airflow poses the main physiological challenge. Small bony structures called tubercles inside the nostrils slow incoming air before it reaches the respiratory system. A translucent third eyelid, or nictitating membrane, protects the eyes from drying and turbulence.

The falcon continually alters wing posture to maintain aerodynamic stability and avoid dangerous instabilities.

A 2018 study in Communications Biology examined how the birds manage forces during the transition from dive to level flight. Long, stiff, tapered wings and specialized feather structure help regulate airflow during this phase. Peregrines rarely strike prey head-on.

They typically deliver angled, glancing blows with partially closed talons to stun or destabilize the target while preserving momentum.