Encounter in a Petri Dish
Left: Messors fighting Argentines in a Petri dish, part of an experiment on the "personality" of different Messor colonies as a whole. [p 18]
Two larger native Harvester Ants (Messor andrei) interact with two smaller non-native Argentine Ants (Linepithema humile) in a petri dish. One Messor has an Argentine ant in her mandibles, head first.
