Flying Ant Day is a fascinating natural phenomenon that occurs annually, typically in the summer, when large numbers of flying ants emerge at the same time.
Despite the dramatic headlines, flying ants are not harmful to humans. Their emergence is one of the world's greatest – albeit most surprising – wildlife spectacles. So here's everything you need to know about Flying Ant Day – and the little winged ants at the centre of it all.
Why 2025 might be the biggest Flying Ant Day yet
Flights of these flying insects usually take place over July and August in the height of summer, but the intense heat (and rain) of spring 2025 means that the flying ants may be swarming earlier than usual – and possibly with greater activity.
Those living in cities will likely experience greater numbers of flying ants, because of their warmer temperatures.
What is Flying Ant Day?
Flying Ant Day is an annual event in the British wildlife calendar, referring to the day, or days, during the summer when large numbers of flying ants emerge simultaneously.
Why does Flying Ant Day exist?
The event is part of the ants' reproductive process, known as the nuptial flight, where male and female ants grow wings and take to the air to mate.
When is Flying Ant Day?
Flying Ant Day typically happens after a period of wet weather followed by warm, humid conditions. This weather pattern provides optimal conditions for the ants to fly and mate.
Which ant species are involved in Flying Ant Day?
The most common species involved in Flying Ant Day in the UK is the black garden ant (Lasius niger), but other ant species also participate in similar events around the world.
Why are there so many flying ants?
The synchrony in emergence is believed to increase the chances of mating success and reduce the risk of predation, as predators cannot consume all the ants at once.
How long does Flying Ant Day last?
The flying phase is brief. After mating, males typically die shortly after the nuptial flight, while mated females land, shed their wings, and start new ant colonies.
What impact does Flying Ant Day have on the environment?
The sudden appearance of large numbers of flying ants can have a significant ecological impact, providing a food source for birds and other predators.
Are flying ants harmless?
The mass emergence of flying ants can be a nuisance, particularly when they invade homes, outdoor activities or areas where food is present. But the good news is flying ants are harmless to humans – so, if possible, sit back and enjoy the spectacle.
Has anyone studied Flying Ant Day?
Researchers study Flying Ant Day to understand more about ant behaviour, reproductive strategies and the environmental factors that trigger these events.
Does Flying Ant Day exist anywhere else in the world?
Although the phenomenon is most famously observed in the UK, similar events occur worldwide, often involving different ant species and occurring at different times of the year depending on the local climate.
One (very bad) joke about Flying Ant Day
Why don't flying ants ever get sick? Because they have tiny ant-bodies!
Swiftly moving on... here are more amazing facts about the animal world: