The Non-Native Species Secretariat (NNSS) has confirmed that Argentine ants (Linepithema humile) have been found in the north-east of England, forming enormous interconnected supercolonies that threaten to displace native ants and disrupt local ecosystems.
Supercolonies and Ecological Impact
According to a report published in Pest Control News, these ants, which are less than 2mm long, create "enormous interconnected 'supercolonies' containing multiple queens and nests." Experts warn they are known to "displace native ants and other arthropods, disrupting food webs and ecological relationships." The ants also protect sap-feeding pests like aphids in exchange for sugary secretions, further harming plant life.
Previous Sightings and Climate Change
While Argentine ants were previously found indoors in Fulham, West London, a hardy outdoor crew has now been discovered in the north-east. Milder winters have enabled them to survive the British cold, expanding their potential range.
Red Imported Fire Ant Threat
The NNSS report also raises alarms about the red imported fire ant, described as the "hard men" of the insect world. This species "possesses a venomous sting that causes a burning sensation and can trigger severe allergic reactions." Scientists revealed that these ants are "capable of surviving flooding by forming floating rafts" out of their own bodies, making them extremely resilient.
Defence Measures
Experts recommend a top-tier biosecurity defence, including monitoring ports, restricting the movement of soil and plants, and using chemical baits to target satellite nests. These measures aim to prevent the establishment of these invasive species across Britain.
