Peregrine falcon

The peregrine is a very fast bird.

It has a blue back and a black head. The females are much larger than the males.

This bird lives in many lands. It can live in the cold north or the warm tropics. It even lives in big cities. The birds use tall buildings to make nests. They like to eat birds like pigeons.

This bird is a wonderful hunter.

The peregrine falcon is a very fast bird of prey.

It has a blue-grey back and a black head. The birds have white parts on their bellies with dark stripes.

Females are much larger than males. This is called sexual dimorphism. In this species, females can be 30% larger than males.

These falcons live almost everywhere on Earth. They live from the cold Arctic to the warm tropics. They can even live in big cities. In cities, they use tall buildings to make nests. They often eat pigeons and ducks. A black patch under their eyes is called a malar stripe. This stripe helps them see better by reducing glare from the sun. In the past, these birds were in danger. This was because of a chemical called DDT. Since people stopped using DDT, the birds have come back. Now, many people help protect their nesting places.

The peregrine falcon is one of the most successful birds of prey on Earth.

It is famous for being incredibly fast. These birds can live almost anywhere on the planet. They live from the cold Arctic tundra to the warm tropics. They stay away from very high mountains and thick rainforests. They are also missing from New Zealand. This makes them the most widespread raptor in the world.

Many birds live in cities, but peregrines are very good at living there too. They use tall buildings as places to nest.

These falcons have a very specific way of hunting and living.

They mostly eat medium-sized birds like ducks or pigeons. In cities, they find plenty of food by eating feral pigeons. The female is much larger than the male. This difference in size is called sexual dimorphism. A female can be up to 30% larger than a male. The males often weigh around 500 to 750 grams. Females are heavier and can weigh more than 1,000 grams. They also have a special notch in their beak. This helps them kill prey by hitting the neck area.

Humans have studied these birds for a very long time.

The English scientist Marmaduke Tunstall first gave them their current name in 1771. The scientific name, *Falco peregrinus*, comes from Medieval Latin. It means "wandering falcon." This name describes how many of these birds migrate long distances. People have also used them for falconry for many eras. They have even been used as symbols for kings and nations. Some people even call them the "duck hawk" in North America.

There are many different types of peregrines called subspecies.

Scientists accept about 18 or 19 different subspecies around the world. Some live in the Rocky Mountains and are called American peregrines. Others live in the Mediterranean and are called Maltese falcons. There is also a subspecies in the Sunda Islands called *ernesti*. These birds can look slightly different depending on where they live. For example, some have darker feathers or different patterns on their bellies. They are all part of the same large family.

It is helpful to think of the peregrine as a master of its environment.

They can adapt to wild cliffs or even human skyscrapers. They once faced a big problem with a chemical called DDT. This chemical made it hard for them to survive. Because people stopped using DDT in the 1970s, the birds have recovered. Now, people protect their nests and release birds into the wild. They even have a black patch under their eyes called a malar stripe. This stripe works like sunglasses to reduce glare from the sun.

The peregrine falcon (*Falco peregrinus*) is a highly successful bird of prey, often called a raptor.

It is a large falcon, roughly the size of a crow, and is famous for its incredible speed. This species is the most widespread raptor on Earth. It lives in nearly every part of the world, from the Arctic tundra to the tropics. The only major ice-free landmass where it is entirely absent is New Zealand. Because they can live in so many places, they are among the most widely found wild bird species.

These falcons have evolved specific physical traits to help them hunt.

Their diet consists almost exclusively of medium-sized birds. However, they will sometimes hunt small mammals, small reptiles, or even insects. A key feature is the notched upper beak. This notch is an adaptation that allows the falcon to kill prey by severing the spinal column at the neck. Another fascinating feature is the malar stripe. This is the patch of black feathers located below the eyes. A 2021 study suggested this stripe helps improve vision by reducing sunlight glare.

Peregrine falcons show a high degree of sexual dimorphism. This means that males and females look different in size. While they share similar markings and plumage, the females are considerably larger. A female can be up to 30% larger than a male. In most subspecies, males weigh less than 750 grams. Females often weigh more than 1,000 grams. In some cases, females can weigh about 50% more than their male breeding mates. Their plumage usually features a blue-grey or slate-grey back and white underparts with dark bars.

History shows how humans have interacted with these birds for centuries. The English ornithologist Marmaduke Tunstall first described the species under its current name in 1771. The scientific name, *Falco peregrinus*, uses Medieval Latin. It translates to "wandering falcon," which refers to the migratory habits of northern populations. The term *Falco* is related to the word for "sickle." This refers to the silhouette of their long, pointed wings during flight. Throughout many eras, peregrines have served as religious, royal, or national symbols. They are also well-respected in falconry due to their high trainability and hunting ability.

There are many different subspecies of the peregrine falcon.

Scientists currently accept between 18 and 19 regional subspecies. These birds vary in appearance based on their environment. For example, the American peregrine (*F. p. anatum*) is found in the Rocky Mountains. The Mediterranean peregrine (*F. p. caucasicus*) is non-migratory and lives near the Caucasus. In the Sunda Islands, the subspecies *ernesti* has very dark, dense barring on its underside. In the past, some groups like the Barbary falcon were considered separate species. However, they are only 0.6% to 0.8% genetically different. This suggests they diverged recently during the Last Ice Age.

In recent history, the peregrine falcon faced a serious threat from human activity. The widespread use of pesticides, especially DDT, caused populations to become endangered in many areas. This chemical caused significant harm to the species. Fortunately, the ban on DDT starting in the early 1970s allowed for a recovery. Populations have grown again thanks to large-scale protection of nesting sites. Humans have also helped by releasing captive-bred birds into the wild. This recovery shows how conservation efforts can help a species bounce back from the brink.

Today, the peregrine is a successful example of urban wildlife. They have adapted to living near humans by using tall buildings as nest sites. These structures act like the natural cliffs they would use in the wild. In cities, they find an abundance of prey, such as feral pigeons and ducks. Feral pigeons are a major food source for many urban peregrine populations. Because pigeons are so abundant in cities, they support many falcons in these settings. This ability to utilize human environments helps the peregrine remain one of the most successful raptors on the planet.