Argentine ants (Linepithema humile) have invaded Rotorua, New Zealand, according to this article from Stuff NZ. The species has been spreading in New Zealand since the 1990's - what makes this story newsworthy is the fact that the ants have been there for two years, but the animal pest coordinator for the Bay of Plenty regional council (apparently responsible for handling such situations), did not find out about the infestation until last week. The ants would normally be dormant during the winter but have remained active in places like Rotorua that are located near geothermal hotspots.
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