Every summer in the UK, millions of flying ants suddenly take to the skies in a mass emergence that startles and fascinates in equal measure. One moment, the pavement is quiet – the next, it’s crawling with winged insects on a mission. This natural event, known as National Flying Ant Day, is more than just a quirky seasonal oddity. It’s a vital part of the ecological cycle, and it offers a perfect chance for people across the UK to connect with nature, learn about insect life, and contribute to citizen science.
In 2026, experts expect an early and larger-than-usual emergence due to the unseasonably warm weather. Seen them already? Let us know – your observations could help researchers track this nationwide phenomenon.
What is National Flying Ant Day?
Flying Ant Day is the term used when thousands – sometimes millions – of winged black garden ants (Lasius niger) emerge from their nests to mate during a warm, still, and humid day. Both male and queen ants develop wings and take part in this mass flight, known as a “nuptial flight.” It’s a coordinated, species-wide effort to reproduce and form new colonies. While each colony may swarm on a different day, the main peak often occurs on the same day across the country, which is why it’s earned the nickname “Flying Ant Day.”
It’s a spectacle that can feel overwhelming – especially if you’re caught in the middle of it on the high street or in your back garden. But these ants are harmless, and their flight plays a crucial role in maintaining healthy ant populations across the UK.
When is National Flying Ant Day?
The exact date varies year by year and depends on the weather. Flying Ant Day usually occurs in July or early August when the weather turns warm and humid after rain. However, in 2026, entomologists from the Royal Society of Biology and other experts have predicted that the phenomenon may begin earlier than usual – possibly as soon as late June – due to record spring temperatures.
Swarming tends to occur from late morning into the afternoon and may last a few hours in one location. It can repeat in different areas over several days or even weeks. Some regions may experience smaller local swarms before or after the main national event.
Why National Flying Ant Day Matters
While many people might find it a nuisance, Flying Ant Day is a key part of the natural lifecycle for ants. The queens that fly and mate on this day will go on to establish new colonies – some of which will survive for decades. These swarms provide essential food for birds like gulls and swifts, and their emergence is a reliable signal for scientists studying seasonal changes and the effects of climate on insect behaviour.
Understanding when and where flying ants appear can reveal a lot about the health of UK ecosystems. Climate change is already shifting the timing of these natural events, and public participation in recording sightings helps researchers track these trends. It’s also a great way for families, schools, and communities to engage with wildlife on their doorstep.
Winged yellow meadow ant queens (Lasius flavus) perch on grass stems, grooming their wings and antennae as they prepare to take flight.
How to Get Involved in National Flying Ant Day
You don’t need to be an expert to make a meaningful contribution. Here are some easy ways to take part:
- Report Your Sighting: Use apps like iRecord or platforms such as iNaturalist to log when and where you see flying ants. Your data contributes to national biodiversity research.
- Take Photos or Videos: Share them on social media using the event hashtags. Tag organisations like the Royal Society of Biology to help amplify your observations.
- Join a Citizen Science Project: Look for local nature groups, wildlife trusts, or community science initiatives. Many organise summer bug-hunting activities and nature walks.
- Educate Others: Talk to children, neighbours, or colleagues about what’s happening and why it matters. It’s a great entry point into discussions about ecology and environmental change.
- Watch the Birds: On Flying Ant Day, gulls and other birds are often seen behaving unusually as they feast on the ants. It’s a brilliant chance to do some urban birdwatching.
Frequently Asked Questions about Flying Ant Day
Are flying ants dangerous?
No. Flying ants are not aggressive and rarely bite. They do not sting and are not harmful to humans or pets. While their sudden appearance can be overwhelming, especially in large numbers, they pose no health risk and usually disappear within a few hours.
Why do so many appear at once?
Flying ants synchronize their emergence to improve their chances of successful mating. By taking to the skies at the same time, they overwhelm predators and maximise genetic diversity. This phenomenon is a classic example of swarm behaviour in the natural world.
Do flying ants infest homes?
Occasionally, flying ants may emerge indoors if a nest has developed in or near the property. However, most swarms happen outdoors. If you find flying ants inside your home and they persist beyond one day, it might be worth seeking advice from a pest control professional.
Should I kill flying ants if I see them?
It’s best not to. Flying ants play a critical ecological role and their swarming lasts only a short time. Rather than spraying chemicals, observe them from a distance or wait for the swarm to pass. Their presence is natural and temporary.
Why do birds go wild on Flying Ant Day?
Many birds, especially gulls and swifts, feast on flying ants as a high-protein treat. Some even alter their flight patterns to follow the swarms. It’s a unique opportunity to observe unusual bird behaviour, especially in urban areas.
What if I have a phobia or sensitivity to flying insects?
If you’re uncomfortable around swarms, try staying indoors during the hottest, most humid part of the day when ants are most likely to emerge. Wearing sunglasses or using a light scarf or hat can help reduce discomfort while outside.
How can I tell if it’s Flying Ant Day in my area?
You’ll usually notice ants with wings appearing suddenly and in large numbers, especially after a humid spell following rain. Check social media or local wildlife forums – many people report sightings online in real time.
History of National Flying Ant Day
Although not an official holiday, Flying Ant Day has become a widely recognised seasonal marker in the UK. The term gained traction through media coverage and public interest, particularly after several swarms in the 2010s were so large they showed up on weather radar maps. Since then, the Royal Society of Biology and other institutions have encouraged the public to log their sightings, turning what was once an annoyance into a grassroots natural event celebrated by citizen scientists and nature lovers alike.
Noteworthy Facts About National Flying Ant Day
- The same ant colonies can produce flying ants every year for decades.
- Swarming is triggered by specific weather conditions – warm temperatures, high humidity, and low wind.
- In 2019 and 2020, swarms were so large they appeared on UK Met Office radar images as rain clouds.
- Black garden ant queens can live for up to 15 years and produce thousands of offspring.
- The phenomenon has inspired everything from school science lessons to BBC nature specials.
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#FlyingAntDay, #FlyingAnts2026, #UKWildlife, #InsectWatch
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