I currently hold about 30 tetramorium colonies under observation in my home. To my knowledge, I have never had any go missing during my time of keeping ants. We have had a mild infestation of tetramorium within the walls of the house that was present when we moved in. This morning, I was reading in my office, and I was surprised to find an ant of the tetramorium genus crawling on my leg. I was concerned, because if my wife thought that I was loosing ants in the house she would get pretty upset.
So - the only way I knew to test that the ant on my leg was one of my own was to introduce it into the captive colony and see if it is rejected or not. Please note, this was not for entertainment or any other cruel purpose, I simply wanted to see if it would be accepted into the colony which would confirm that I had a leak or not. I only have one colony which is in a more open environment (formicarium, outworld, etc) so I placed the found ant into the colony and watched. The ant was quickly attacked and killed.
Is this a sound method of confirming that this ant was from the previous infestation and not a loose ant from one of my captive colonies?