A native green tree ant dispatches a worker of a non-native species, the yellow crazy ant, in tropical Australia. In nature such fights typically go the other way; yellow crazy ants are rapidly displacing many species of native ants. Cairns, Queensland, Australia.
Most army ant species are specialized predators of other ants. Eciton vagans prefers ponerines; true to form, here two Eciton workers attack an Odontomachus trap-jaw ant. Armenia, Cayo District, Belize.
An ant from a competing colony does not pass the smell test and is quickly dispatched. Tower Hill Reserve, Victoria, Australia.
