Queensland farmer captures rare video of invasive fire ants building 'large floating rafts' – video

A farmer on the Gold Coast has captured video of fire ants forming floating rafts to survive flood waters in south-east Queensland. The footage was sent to Reece Pianta of the Invasive Species Council, who says the red imported fire ants (Rifa) only make rafts when they reach a certain density. The footage indicates there's been a surge in the population of the ants, which have infested about 700,000 hectares in Brisbane. "The concern we have is that if Rifa are floating on flood waters to lower-lying areas. They don't just inundate farmlands but wetlands and coastal habitats." Pianta says the rafting behaviour underlines the importance of properly funding the ant's eradication

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• Fire ants form rafts to survive Queensland flood waters as experts warn of surge