Riga swarmed by unusually large numbers of flying ants

On July 26, residents of Riga reported massive swarms of winged ants inside buildings and public spaces. The municipal government explained that the insects are reproductive ants – males and new queens – that take flight in warm, humid weather to establish new colonies. The phenomenon is seasonal, typically lasting a few hours to a few days, and poses no health risk; the ants do not bite, transmit disease, or cause damage.

Entomologist Jānis Dreimanis noted that similar large‑scale flights occurred in 2012 and are common during midsummer when conditions are moist. Authorities advised people to keep windows closed, dim indoor lighting in the evenings, and avoid using outdoor insecticides, emphasizing that the swarms will dissipate on their own.