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Australia's 
 are under threat from one of the world's most invasive 
 – the red fire ant. The 
 ant is native to South America, but has spread worldwide. It causes huge 
 to crops and farms. It also kills 
 insects and other animals, including 
. The ant's painful and venomous 
 can cause allergic 
 in humans. It is deadly and can cause fatal 
 shock. The Minister for Agriculture called the ants a "super-pest, which cause serious social, economic and environmental 
".