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SwallowInteresting facts and information

swallow

Swallows are birds in the family Hirundinidae, adapted to catching insects in flight. The barn swallow (Hirundo rustica) is one familiar species, with a forked tail and close associations with farms and other human buildings.

Many swallow populations migrate between breeding and wintering grounds. Changes to habitats and insect food supplies can affect their numbers, with trends differing between species and regions.

Quick facts

Common name Swallow
Scientific name Hirundinidae; Hirundo rustica is the barn swallow
Typical lifespan Usually 2-5 years in the wild; some live more than 10 years
Maximum speed About 35-55 km/h in normal flight
Wingspan About 32–35 cm for the barn swallow; varies across other swallow species
Length About 15-20 cm (including tail streamers)
Weight About 16-25 g
Diet type Insectivore (flies, mosquitoes, flying ants and other flying insects)
Main predators Hobbies and other falcons, hawks, owls, domestic cats, rats, snakes
Conservation status Assess separately by species and population; different taxa and regions have different needs
Geographical distribution Every continent except Antarctica
Habitat Farms, villages, grasslands, wetlands
Social behaviour Nests in pairs or small colonies; migrates in large flocks
Special adaptations Agile flight, long-distance migration, nesting on buildings

Interesting facts

  • Long-distance travellers - Barn swallows from Europe fly about 10,000 km to spend the winter in southern Africa, and come back every spring.
  • Mud nests - A pair builds its cup-shaped nest from hundreds of little beakfuls of mud mixed with saliva, lined with grass and feathers.
  • Drinking on the wing - Swallows catch almost all their food in the air and even drink by skimming the surface of the water.
  • Insect hunters - A family of swallows can catch thousands of flies, mosquitoes and other insects a day.
  • Faithful to home - Swallows often return to the same building, and even the same nest, year after year.
  • Long tails win - Female barn swallows prefer males with long, symmetrical tail streamers, a sign of good health.
  • "One swallow does not make a summer" - This saying comes from the ancient Greek writer Aristotle, because the first swallows of spring do not mean that warm weather has arrived.

Records and remarkable features

  • Swallows are birds in the family Hirundinidae, adapted to catching insects in flight. The barn swallow (Hirundo rustica) is one familiar species, with a forked tail and close associations with farms and other human buildings.
  • The most widespread swallow - The barn swallow breeds across most of the Northern Hemisphere and winters across the Southern Hemisphere.
  • National bird - The barn swallow is the national bird of Estonia and Austria.
  • Huge roosts - Before and during migration, millions of swallows may gather to roost in reedbeds.

Characteristics

The swallow is a small, slender and very agile bird, one of the best adapted birds for fast, twisting flight.

Physical aspect

  • Slim, streamlined body - Built for fast, agile flight.
  • Long, pointed wings - Allow gliding and sudden changes of direction in the air.
  • Deeply forked tail - In the barn swallow, the outer tail feathers form long "streamers" that help with steering.
  • A tiny beak with a wide gape - Ideal for catching insects in flight.
  • Small, weak legs - Good for perching, but not for walking.
  • Colours - The barn swallow has a glossy dark blue back, a reddish forehead and throat and a cream or pale orange belly.

Special adaptations

  • Sharp eyesight - Lets them spot and follow small, fast-flying insects.
  • Endurance - They can fly thousands of kilometres on migration, feeding on the way.
  • Efficient flight - Swallows use gliding and rising air to save energy.
  • Living with people - They nest in barns, stables, porches and under bridges.

Habits and behaviour

Swallows are social, migratory and very active birds that spend most of the day flying.

Social behaviour

  • Pairs and colonies - Barn swallows nest in pairs, often several pairs in the same barn, and gather in large flocks before migration.
  • Territory - Each pair defends a small area around its nest.
  • Helpers - Sometimes young birds from an earlier brood help their parents feed the next brood.

Hunting and feeding techniques

  • Feeding in flight - Swallows catch insects in the air, often flying low over fields and water.
  • Open areas - They hunt over meadows, pastures, rivers and lakes, where insects are plentiful.
  • Drinking in flight - They skim the water's surface and scoop up a sip without landing.

Defence and Survival Techniques

  • Speed and agility - Swallows escape predators with fast flight and sudden turns.
  • Alarm calls - When they see a predator, they give sharp alarm calls and may dive at cats and birds of prey.
  • Safe nests - Nests inside buildings are hard for predators to reach.

Habitat and geographic distribution

Swallows and martins live on every continent except Antarctica.

Region Example species Habitat Preferred
Europe Barn swallow (Hirundo rustica rustica) Farms, villages, meadows
North America Barn swallow (Hirundo rustica erythrogaster), tree swallow, cliff swallow Open country, farms, rivers
Asia Barn swallow (Hirundo rustica gutturalis) Farmland, villages, towns
Africa Wintering barn swallows; many resident swallows, such as the wire-tailed swallow Savannas, grasslands, rivers
Australia Welcome swallow (Hirundo neoxena) Open country, coasts, towns

Types of Habitat

  • Farms and villages - Barn swallows nest in barns, stables, sheds and under bridges.
  • Grasslands and pastures - Rich in insects, especially near livestock.
  • Wetlands - Rivers, lakes and marshes provide insects, mud for nests and reedbeds for roosting.

Human Impact and Threats

  • Pesticides - Fewer insects mean less food for swallows.
  • Fewer nest sites - Modern buildings and closed barns leave fewer places to build nests.
  • Climate change - Droughts in Africa and changes in weather can make migration harder.

Diet and feeding

The swallow is an insectivore that catches its prey in flight, helping to control insect numbers.

What does the swallow eat?

Type of food Examples
Flies House flies, horseflies, mosquitoes, midges
Other flying insects Flying ants, aphids, small beetles, moths
Bees and wasps Occasionally caught in flight
Spiders Small spiders drifting through the air
Grit Tiny bits of sand or shell, which may help digestion

Feeding techniques

  • Catching insects in the air - Swallows snap up insects with their wide-gaped beak while flying.
  • Flying for hours - On warm days, swallows spend most of the day hunting.
  • Following the weather - On fine days, insects fly higher and so do swallows; before rain, insects fly low, and swallows hunt close to the ground.
  • Feeding chicks - Parents bring balls of insects to their chicks, many times an hour.

Adaptation to Food Availability

  • In summer, there are plenty of insects for swallows and their chicks.
  • When it gets colder and insects become scarce, they migrate to warmer regions.
  • In bad weather, they often hunt low over water, where insects are still active.

Reproduction and life cycle

Barn swallows are mostly monogamous; pairs often stay together for the season and sometimes meet again the next year.

Characteristic Details
Age of sexual maturity About 1 year
Breeding season About April - August in Europe
Number of eggs per nest Usually 4-5 (3-7)
Incubation period About 14-16 days
Time in the nest About 18-23 days; fed by parents for another week or so
Broods per year Usually 2 (sometimes 3)
Life expectancy Usually about 2-5 years; some live more than 10 years

Breeding process

  • Males sing and display their tail streamers to attract a female.
  • Both partners build the nest from mud and grass, usually on a beam or ledge inside a building.
  • The female incubates the eggs, and the male guards the nest.
  • Both parents feed the chicks, which stay in the nest until they can fly, and keep feeding them for a while afterwards.
  • Swallows defend their nest by diving and calling at predators.

Survival Strategies

  • If a nest is destroyed, the pair can quickly build a new one.
  • Young swallows soon learn to fly and catch insects.
  • Sometimes older offspring help feed younger brothers and sisters, increasing their chances of survival.

Name and history

The swallow has been known since ancient times and has a special place in mythology, literature and symbolism.

Origin and etymology of the name

  • The English word "swallow" comes from Old English swealwe, an old Germanic name for the bird.
  • The scientific name Hirundo rustica comes from Latin: hirundo means "swallow" and rustica means "of the countryside", referring to its life on farms.

Swallow in the History of Humanity

  • Ancient Egypt - In one myth, the goddess Isis turned into a swallow while searching for her husband Osiris.
  • Ancient Greece - In Greek myth, Procne was turned into a swallow to escape her husband, King Tereus of Thrace; Aristotle wrote that "one swallow does not make a spring".
  • The Middle Ages - Before migration was understood, many people believed that swallows spent the winter asleep in the mud at the bottom of ponds.
  • Modern science - Ringing swallows has helped scientists understand bird migration.

Swallow in Folklore and Superstition

  • Good luck - In many countries, a swallow nesting on a house is believed to bring good luck and protection.
  • The bird of spring - The return of the swallows is a traditional sign that spring has arrived.
  • Sailors' tattoos - Sailors traditionally got a swallow tattoo after sailing 5,000 nautical miles, and a second after 10,000.

Cultural significance and mythology

As a bird that returns every spring, the swallow is a symbol of hope, home, faithfulness and the coming of spring in many cultures.

  • Returning home - Because swallows return to the same nest, they became a symbol of coming home safely, especially for sailors.
  • San Juan Capistrano - In California, the return of cliff swallows to the old mission every March is celebrated with a festival.
  • A bird of freedom - In folklore, the swallow is often called a bird of freedom, because it was said to die if kept in a cage.

Conservation status and threats

The barn swallow is not threatened, but its numbers have fallen in some regions, and some other swallow species are rare.

IUCN Status Species Affected Affected Regions
Least Concern (LC) Barn swallow (Hirundo rustica) Global
Vulnerable (VU) Blue swallow (Hirundo atrocaerulea) Southern and eastern Africa
Endangered (EN) White-tailed swallow (Hirundo megaensis) Southern Ethiopia
Endangered (EN) Bahama swallow (Tachycineta cyaneoviridis) Bahamas

Main threats

  • Fewer insects - Pesticides and intensive farming reduce the swallows' food.
  • Loss of nest sites - Modern buildings and the closing of barns leave fewer places to nest.
  • Climate change - Droughts and storms on migration routes can kill many swallows.
  • Habitat loss - Wetlands and pastures are being replaced by towns and intensive farmland.
  • Predators - Domestic cats and birds of prey, such as the hobby, a small falcon, catch many swallows.

Conservation efforts

  • Fewer pesticides - Some countries have reduced the use of chemicals that kill insects.
  • Nest sites - People leave barn doors open, put up nest cups and keep muddy puddles for nest building.
  • Monitoring - Researchers follow swallows with ringing and tiny tracking devices to study their migration.
  • Education - Campaigns ask people not to remove swallow nests from their buildings.

  • "The Happy Prince" (Oscar Wilde, 1888) - A swallow stays behind in winter to help a statue give its treasures to the poor.
  • "Thumbelina" (Hans Christian Andersen, 1835) - A swallow rescued by Thumbelina carries her away to a warm land.
  • Swallows and Amazons (Arthur Ransome, 1930) - A classic children's adventure book named after the children's sailing boat, the Swallow.
  • Tattoos - The swallow is one of the most popular traditional tattoo designs.

Did you know? About swallow

  • There are about 90 species of swallows and martins around the world.
  • Barn swallows usually live about 2-5 years in the wild.
  • Swallows are built to catch insects in flight, with a slim body and long, pointed wings that give them great agility and endurance.
  • Their long, pointed wings have nine main flight feathers.
  • Their legs are short and weak, suitable for perching rather than walking.
  • Swallows have short beaks but a very wide gape for catching insects.
  • Most swallows eat flying insects caught in the air, although a few species occasionally eat berries.
  • Swallows make many different calls and songs, used in courtship, to keep in touch and to warn of predators.
  • Many European and North American swallows migrate long distances, while many African swallows do not migrate.
  • Usually, the male chooses a nest site and then attracts a female with song and display flights.
  • The barn swallow (Hirundo rustica) is the most widespread swallow in the world.
  • Swallows and swifts look alike but are not closely related.
  • In folklore, the swallow is called a bird of freedom because it was said to be unable to live in a cage.
  • A swallow tattoo was a traditional sign that a sailor was experienced.
  • Barn swallows once nested in caves and on cliffs, but now nest mainly on buildings such as barns, stables and bridges.
  • Sailors traditionally got a swallow tattoo after sailing 5,000 nautical miles (about 9,260 km) and a second after 10,000 nautical miles.
  • Swallows are expert acrobats, making sudden turns, twists and dives to catch insects.
  • Swallows eat flies, mosquitoes, flying ants, moths, beetles and occasionally bees and wasps. Related profile: Fly. Related profile: Bee. Related profile: Wasp. Related profile: Ant. Related profile: Butterfly.
  • Female barn swallows prefer males with long, symmetrical tail streamers.
  • Unpaired males sometimes try to break up pairs, even destroying eggs or chicks.
  • In ancient Egyptian myth, the goddess Isis turned into a swallow.
  • In Greek mythology, Procne was turned into a swallow to escape her husband, King Tereus of Thrace.
  • When swallows are thirsty, they skim low over the water and drink in flight.
  • The main predators of barn swallows are cats, falcons such as the hobby, hawks and owls. Related profile: Cat. Related profile: Gull.
  • Barn swallows build cup-shaped nests of mud, grass and feathers; both partners build the nest.
  • Barn swallows usually raise two broods a year; the female lays about 3-7 eggs, which hatch after about 14-16 days.
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