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The insects, which emerged earlier this year due to hot weather, have bodies the size of raindrops.
LONDON – So many people have infested flying ants that they were mistaken for rain on Met Office radar. The insects lit up sensors as Britain recorded its highest temperatures ever recorded in June and are expected to cause more false readings in the coming days as the hot weather continues.
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This article by Sarah Knapton was written in collaboration with telegraph.co.uk.
Large-winged ants, known as winged ants, typically swarm in July and August during calm, hot and humid weather, but early heat has triggered an early outbreak.
The Met Office has confused flying ants with drizzling rain (symbolic image). © IMAGO / image broker
It is a myth that they appear on a specific day of the year, often called “Flying Ant Day”, as they breed throughout the summer and can sometimes even appear as late as September.
This year, the peak of large herds is expected between July 10 and July 25. Insects are mistaken for rain on radar because their bodies are the size of raindrops and reflect light in a similar way. They can also form into streaks up to 50 miles wide, which can be confused with clouds.
Flying ants deceive radars and observers
This was reported by a representative of the meteorological bureau. Telegraph: “Brief effects of flying ants are quite common to be seen on radar images at some point during the year, often appearing as brief fields of drizzle. It looks like rain, so people might look at live observations and suspect rain in the area, when in fact it is the influence of flying ants.”
“They tend to appear when it gets warmer and brighter, so one way to recognize them in observations is that they don’t match the weather data of the day. This does not affect the weather forecast. They are quite easy to identify, not least due to the lack of rain in the rain gauge on the ground.”
Ants have plagued Britain in recent days. Drivers are complaining that so many people are clogged up their windshields that it’s hard for them to see the road, and homeowners are forced to keep their doors and windows closed despite the heat.
Almost 90 per cent of the UK’s flying ants are black ants and they swarm as part of their natural reproductive cycle, in which young queens and males leave the underground colonies at the same time to mate in the air.
Swarming as part of the life cycle
Red ants and carpenter ants can also swarm, and large winged females and smaller males often fly together during mating.
After mating, the queens bite off their wings and begin searching for a new underground nesting site to start a new colony, often resulting in discarded wings littering the ground and large flightless insects running along the paths.
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After mating, males live only one to two days. Nests are often created in flower beds, lawns or patios, which is why they are such a common problem in gardens and can contain up to 20,000 ants. Flocks have also caused gulls, swallows, house martins and swifts to feed.
In previous years, there were so many flying insects in London that Wimbledon players choked on the insects or had to pull them out of their hair and clothes. Mark Dwelley, head gardener at the 32-acre Audley Standbridge Earls care home in Hampshire, said vinegar was a good way to repel ants from flower borders and advised homeowners to let the birds solve the problem.
Work with nature, not against it
“The day of the flying ants causes a lot of panic and a flurry of internet searches, but the idea that everything happens in one 24-hour window is actually a myth. The UK is experiencing flying ant season,” he said. “Work with nature, not against it. Let the birds do the cleaning to keep your garden safe and chemical-free.”
“When the flocks finally take off, your garden immediately becomes a popular feeding ground for local birds. Flying ants are a vital, protein-rich snack for swifts, swallows and seagulls. You may even spot seagulls doing a weird tap dance on your lawn—a clever trick that mimics the vibrations of rain to encourage ants to rise from the ground.”