--- title: "Peregrine Falcon (Falco peregrinus) | AnimalTracks.wiki" description: "The sky's guided missile, folding into a 320 km/h (200 mph) stoop with the same navigation math built into real missiles." image: "https://animaltracks.wiki/images/animals/peregrine-falcon-1.webp" published: "2026-08-30" updated: "2026-09-23" --- # Peregrine Falcon (*Falco peregrinus*) > **Status**: Checked against 10 sources, listed under Sources below. > **Tagline**: The sky's guided missile, folding into a 320 km/h (200 mph) stoop with the same navigation math built into real missiles. > **Soundtrack Vibe**: Neo-Classical & Baroque Chamber // Antonio Vivaldi, "Winter (Allegro non molto)" > **Soundtrack Links**: [Spotify](https://open.spotify.com/track/6Ai8JHnZXmvuft6zx7EbuA) | [YouTube](https://www.youtube.com/watch?v=9aOceCPg5CA) > **Vibe Match**: The dramatic intensity of a high-speed violin concerto for a bird that folds its wings flat against its body and dives on prey at more than 320 km/h. ## Biological Superpowers & Stats - **Taxonomy**: *Falco peregrinus* - **Danger Level**: Medium - **Conservation Status**: Least Concern ([IUCN Red List](https://doi.org/10.2305/iucn.uk.2022-1.rlts.t45354964a210513652.en)) - **Superpower**: A stoop dive topping 320 km/h (200 mph), steered by the same proportional-navigation math used in guided missiles - **Habitat**: Cliff faces and city skyscrapers on every continent except Antarctica, most common in tundra and coastal areas - **Diet**: Almost entirely birds, led by pigeons and doves, plus shorebirds, waterfowl, grouse, songbirds and some bats - **Tags**: raptor-bird, arctic-tundra, mountains, apex-predator, super-speed ## Natural History & Behavior ## A Guided Missile With Feathers A peregrine falcon hunts with a stoop, a steep, controlled dive onto its prey, and it is one of the world's fastest birds. In level flight it reaches up to 150 km/h (93 mph), but diving on prey it tucks its wings tight to its body, and studies report it going faster than 320 km/h (200 mph). Estimates of its top diving speed run as high as 565 km/h, though one aerodynamics study points out that speeds this high have never been accurately measured. That study's mathematical model of an ideal 1 kg falcon found that by shrinking its wingspan while pulling out of a vertical dive, it could generate 18 times its own body weight in lift, against 1.7 times at full wingspan, and would lose 60 metres of altitude doing it. Attack paths measured in captive-bred peregrines chasing lures closely fit the guidance law used in missiles, called pure proportional navigation, which steers by how fast the line of sight to the target is turning. The stoop ends with a massive blow delivered in mid-air. A peregrine catches prey with its talons, but it generally kills with its beak, severing the bones of the neck. ## Built Like a Falling Knife A peregrine measures 36 to 49 cm long with a wingspan of 80 to 114 cm and weighs 330 g to 1.5 kg, and females are typically 40 to 50 percent heavier than males. British ringing records put a peregrine's typical life expectancy at 7 years once it reaches breeding age, and the oldest ringed bird lived past 21 years. > **A flicker-fusion rate of at least 129 Hz** is how many flashes of light a second a peregrine's eyes can still tell apart, more than a saker falcon's 102 Hz or a Harris's hawk's 81 Hz. Researchers suggest a link to hunting style: the falcons chase fast, agile prey, while the hawk flies more slowly after slower prey. Do the dark cheek stripes, called malar stripes, cut sun glare? A 2021 study found peregrine stripes are larger and darker where average sunlight is stronger, strong support for the idea in this species, but a 2023 study found no universal support in other falcons. A 2025 study of 12 falcon species found stripe size and darkness did not differ with hunting style, habitat or migration, suggesting other jobs such as thermoregulation (keeping body temperature steady) or camouflage also play a role. ## Cliffs, Skyscrapers and Whatever Flies Past Peregrines live on every continent except Antarctica and are most common in tundra and coastal areas. They nest on cliff faces and crevices, and have begun to move into cities, where tall buildings make good nest sites and pigeons are plentiful. Birds make up 77 to 99 percent of their prey, with pigeons and doves the most important by weight, alongside shorebirds, waterfowl, grouse and songbirds. Bats are the mammal they catch most often. ## A Comeback Written in Eggshells Two pesticides, DDT and dieldrin, reduced the falcons' ability to build eggshells with enough calcium, making the shells thin and more likely to break. Peregrine numbers crashed in the mid-20th century, and every breeding pair in the eastern United States vanished. Captive breeding, releases into the wild and limits on pesticide use brought them back, and the IUCN now lists the species as Least Concern worldwide. ## Frequently Asked Questions ### How fast can a peregrine falcon actually dive? Faster than 320 km/h (200 mph), according to studies of its hunting dives, with its wings folded flat against its body. In ordinary level flight it reaches up to 150 km/h (93 mph). Some estimates go higher still, but speeds that high have never been accurately measured. *(Source: [Ponitz et al. 2014]())* ### Does a peregrine falcon really kill prey with a kick from its feet? Not quite. Its feet do the catching, gripping prey with the talons. The killing is usually done by the beak, which cuts through the neck vertebrae. *(Source: [Animal Diversity Web, University of Michigan]())* ### How fast do a peregrine falcon's eyes actually work? Very fast. In one experiment a peregrine could still tell apart flashes of light flickering at least 129 times a second. A saker falcon managed 102 and a Harris's hawk 81, and the researchers suggest the difference may be linked to how each one hunts. *(Source: [Potier et al. 2019]())* ### Do the dark stripes under a peregrine falcon's eyes really block sun glare? Maybe, and the evidence is mixed. In peregrines the stripes are larger and darker in sunnier places, which backs the anti-glare idea. Studies of other falcons found no universal support for it, and a 2025 comparison of 12 falcon species suggests other jobs, such as camouflage or controlling body heat, also play a role. *(Source: [Polak & Ottenburghs 2025]())* ## Sources 1. [Falco peregrinus (peregrine falcon). Animal Diversity Web, University of Michigan.]() 2. [Peregrine Falcon Program. New York State Department of Environmental Conservation.]() 3. [Peregrine Falcon. Audubon Guide to North American Birds.]() 4. [Peregrine. BTO BirdFacts, British Trust for Ornithology.]() 5. [Ponitz et al. (2014). Diving-Flight Aerodynamics of a Peregrine Falcon (Falco peregrinus). PLoS ONE.]() 6. [Tucker (1998). Gliding Flight: Speed and Acceleration of Ideal Falcons During Diving and Pull Out. Journal of Experimental Biology.]() 7. [Mills et al. (2018). Physics-based simulations of aerial attacks by peregrine falcons reveal that stooping at high speed maximizes catch success against agile prey. PLOS Computational Biology.]() 8. [Potier et al. (2019). How fast can raptors see? Journal of Experimental Biology.]() 9. [Polak & Ottenburghs (2025). Migration, Habitat and Hunting Style Do Not Affect the Malar Stripe of Different Falcon Species. Ecology and Evolution.]() 10. [Westrip et al. (2022). Falco peregrinus. The IUCN Red List of Threatened Species 2022: e.T45354964A210513652.]() *Published August 30, 2026. 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