Common swift

The swift is a dark bird.

It has long wings. They look like a boomerang.

This bird loves to stay in the air. It can fly for ten months! It eats bugs while it flies.

Swifts build nests in buildings. They use bits of stuff from the air. They use spit to hold it together.

They make a loud scream. Many birds fly together in a group. They call to each other.

These birds fly to warm lands. They go to Africa for the winter. They are amazing flyers.

The common swift is a dark bird that loves the sky.

It has very long wings. They look like a boomerang or an anchor. These birds spend almost their whole lives flying. Some can stay in the air for ten months without landing! They eat, drink, and even sleep while they fly.

Swifts have very short legs. They use them to cling to walls. They do not like to sit on the ground. Instead, they build nests in high places. They might use holes in trees or cliffs. Many swifts now nest in buildings under roof tiles.

They make nests by catching bits of stuff in the air. They use their saliva, which is spit, to glue it all together.

These birds travel very far each year. This long trip is called migration. In the summer, they live in places like Europe and China. When it gets cold, they fly to Africa. They follow rivers and use warm winds to help them fly.

This helps them find plenty of insects to eat.

The common swift is a remarkable bird that lives mostly in the sky.

These birds are medium-sized and look a bit like swallows. However, they are actually quite different in how they live. Swifts have very long, swept-back wings that look like a crescent or a boomerang. They also have very short legs. These legs are used for clinging to vertical surfaces like walls.

Because they are built for flight, they do not settle on the ground. Instead, they spend almost their entire lives in the air. Some individuals may spend up to ten months in continuous flight. They even eat, drink, and sleep while flying.

To stay in the air, swifts follow a very special way of life. They catch insects while they are flying through the sky. When they need to rest, they use high places to nest. Swifts build their nests using material they catch in mid-air. They use their saliva, or spit, to glue these bits together.

They often build nests in the gaps of buildings or under roof tiles. In the past, they used holes in ancient forests. Some nests are even found in old woodpecker tree burrows. In places like the Białowieża Forest in Poland, there are 600 reported nests. Young birds can even survive for a few days without food. They do this by dropping their body temperature and metabolic rate.

Humans have studied these birds for a very long time. The Swedish naturalist Carl Linnaeus first described the species in 1758. He originally gave them the name Hirundo apus. Later, in 1777, the Italian naturalist Giovanni Antonio Scopoli created the genus name Apus. This name comes from the Ancient Greek words meaning "without foot." Ancient people believed these birds had no feet at all. Today, we know they have short legs for clinging to walls. Scientists use tools like radar to track how they move. This helps us see how they fly in flocks during the evening. This social behavior might help them exchange information while flying.

Common swifts are travelers that move across huge distances.

Their summer breeding range stretches from Portugal and Ireland to China and Siberia. They breed in many places, including Norway, Finland, and even parts of Russia. When it is time to migrate, they fly toward Africa. Some swifts from Sweden fly all the way to the Congo region. They use rivers to find food and warm winds to help them fly. In Central Europe, they usually return between late April and early May. The weather can change when they arrive each year. Their long journeys allow them to cover millions of kilometers in a lifetime.

It is easy to mistake a swift for a barn swallow.

However, you can tell them apart by looking closely. Swifts have a very loud, screaming call. Swallows make a much quieter, babbling sound. The wings of a swift are longer than its body. A swift's wings look like an anchor in the sky. Swallows have a more fluttering way of flying. Swifts also glide for much longer periods. You can also see a small white patch on a swift's chin. This small detail helps you know exactly which bird you are seeing.

The common swift (Apus apus) is a medium-sized bird defined by its extraordinary aerial lifestyle.

While they look similar to barn swallows, they belong to a different order called Apodiformes. This similarity is a result of convergent evolution, where different species develop similar traits due to similar environments. Swifts are most closely related to Southeast Asian treeswifts and New World hummingbirds. Their scientific name, Apus, comes from the Ancient Greek words for "without foot." This name reflects an ancient belief that these birds lacked feet entirely. In reality, they possess very short legs designed specifically for clinging to vertical surfaces.

To survive, swifts have mastered a life of near-constant motion. They spend most of their lives in the air, where they hunt for insects, drink water, mate, and even sleep. Some individuals may stay in continuous flight for up to ten months without ever landing. When they do land, it is usually to nest or to cling to a wall. They do not settle on the ground voluntarily because they would be vulnerable to predators or accidents. To build their homes, swifts catch airborne materials while flying. They use their saliva as a biological glue to bond these materials together.

They often nest in building eaves, window sills, or gaps under roof tiles. Historically, they used tree burrows in ancient forests, such as the Białowieża Forest in Poland, which has 600 reported nests.

Swifts exhibit complex social behaviors and specialized physical traits. They are known for forming "screaming parties" during summer evenings. During these events, groups of 10 to 20 birds gather in flight to call out to nesting swifts. Larger groups form at higher altitudes toward the end of the breeding season. Radar tracking has shown that swifts often move in flocks during their dawn and evening transitions. This flocking behavior likely allows for cue acquisition and information exchange between individuals. Physically, they are characterized by long, swept-back wings that resemble a crescent or a boomerang. Their plumage is mostly blackish-brown, though they have a small, pale patch on their chins.

The history of swift classification involves several famous naturalists. The Swedish naturalist Carl Linnaeus first described the species in 1758. He originally placed them in the genus Hirundo. Later, in 1777, the Italian naturalist Giovanni Antonio Scopoli established the current genus, Apus. This was done based on tautonymy, which relates to the bird's name. Understanding these birds has required significant scientific effort over centuries. From Linnaeus's early descriptions to modern geolocator tracking studies, our knowledge of their movements has grown immensely. We now understand how they navigate vast distances using environmental cues.

Migration is a massive undertaking that defines the life of a common swift. Their breeding range is vast, stretching from Portugal and Ireland to China and Siberia. They breed in many regions, including Northern Africa, the Middle East, and much of Europe. When the breeding season ends, they migrate to Equatorial and Sub-Equatorial Africa. For example, geolocator studies show that swifts breeding in Sweden spend their winters in the Congo region. The journey is long and timed by the light cycle. Departure often begins when the day reaches fewer than 17 hours of light.

Over a lifetime, these birds can cover millions of kilometers.

Swifts use specific environmental strategies to make their long journeys successful. In Central Europe, they typically return between late April and early May. During their migration, they may follow rivers to find better food supplies in bad weather. They also utilize atmospheric patterns to save energy. During spring migrations, they use low-pressure fronts to exploit the southwestern flow of warm air. On the return trip, they ride northeastern winds on the back of these same fronts. This ability to use wind and pressure helps them navigate across continents. Without these specialized flight patterns, such long-distance travel would be much more difficult.

It is important to distinguish the common swift from the barn swallow.

While they both hunt airborne insects, their silhouettes and sounds are very different. A swift has a loud, shrill, screaming call, whereas a swallow has a quieter, babbling sound. The swift's wings are longer than its body and look like an anchor in the sky. Swallows have a more fluttering flight pattern and press their wings further to the rear. Additionally, the underside of a swift is dark brown, while a swallow's underside is often beige-white. Recognizing these details helps observers identify the swift's unique place in the avian world.