Definition of red ants:
(n) :
The red imported fire ant (Solenopsis invicta), native to South America, but broadly invasive.
(n) :
(US) The pharaoh ant (Monomorium pharaonis).
(n) :
(Australia) The meat ant (Iridomyrmex purpureus), endemic to Australia.
(n) :
The red harvester ant (Pogonomyrmex barbatus), native to southwestern US.
(n) :
An ant of the genus Myrmica, especially the European red ant or common red ant (Myrmica rubra).
(n) :
Any of various red-coloured ants.