Australian Floods: Fire Ants Create 'Flood Rafts' to Expand and Pose a Threat

Fire ants in Queensland, Australia are using rafts to travel on floodwaters, spreading one of the world's most invasive species. This behavior is an indication that fire ant populations are increasing in Australia. Fire ants are considered a super pest as they can cause significant ecosystem changes and agricultural losses by feeding on native plants and animals. Their stings are also poisonous and can be fatal to humans. The Invasive Species Council (ISC) is urging communities in south-east Queensland and northern New South Wales to be vigilant as fire ants move with the currents to establish footholds in new areas. Fire ants have already infested around 700,000 hectares of land in cane farms south of Brisbane. Introduced to Australia in 2001, it is still a mystery how they entered the country. However, it is believed that they were likely brought in through shipping containers from the US. In November, fire ant nests were discovered in New South Wales, prompting increased funding for eradication efforts. The spread of fire ants is mainly facilitated by contaminated soil and materials transported by humans, although winged queens can fly several kilometers and even longer distances when carried by wind currents. The unique climate of Australia, combined with the absence of natural predators, makes it a perfect habitat for fire ants, which could potentially inhabit the entire continent if not controlled. One of the greatest concerns is the possibility of fire ants infiltrating the Murray Darling River system and rapidly spreading to new states and territories. A single colony of fire ants can contain up to 100,000 ants, with a mature queen capable of laying up to 5,000 eggs per day. Fire ants have already spread to various countries, including the US, China, Taiwan, Japan, and the Philippines.