Country: England Pets: Ants, 1 Canary, 7 Finches, 2 dogs and 1 wife Favourite Ant: Formica rufa & Camponotus habereri I Like: Daleks, History and good movies. I Hate: Very spicy food and hot curry. I Am: A Senior Citizen Joined: April, 2008 Likes: 4,358
Most worker ants live for about a year (12 months), though this depends on how certain factors inside the nest are controlling brood development and adult ant population, as I believe L. niger workers may live up to 2 years. It is rare for a worker to die from 6 - 9 months unless it is either killed, or develops some illness/disease.
It is fair to assume that workers will live from 12 to 18 months on average