Why do ants carry other ants?

After two days, the living ants take the dead ant to an ant graveyard in a respectful procession, honoring the good work it performed for the colony. Well, not quite. The carcass does lie there for two days and it is carted off to a pile of dead ants. read more

When the ants carry their dead back to their colonies, they dump them to their personal waste disposal area which is the midden. Scientist had made different studies on how ants determine the death of their own species. read more

Once an ant is dead, it can't identify it self (by antenna touching etc) as coming from the same nest as its comrades, so it is seen as food by the other ants. Ants aren't intelligent enough to be squeamish about eating a relative. read more