Iridomyrmex

also known as meat ants (in Australia), rainbow ants (referring to their blue-green iridescent sheen), or tyrant ants (in Asia).

They are also one of the most ecologically important groups as they interact strongly with many other invertebrates as well as many plants. Iridomyrmex species frequently form large nests which are patrolled by aggressive workers. This can significantly reduce the number of other species which can nest or forage in the area.