I really don't know what kind of ants they were, but they were very tiny and to me looked both black and red. They did not make much of a nest in my vegetable garden, where the beds are raise about 6 inches and the weeds had gotten away from me this summer and are in need of a good weeding. It looked like the ants were eating the plants, and not really in hills. In the fields, they made large mounds and were almost impossible to get rid of, until my husband got some livestock safe insect killer at our local feed store and applied it several times to the hills. I think itwas called Permethn. I would not let him use it in the garden, since I have not used any chemicals or chemical fertilizers in over 35 years, on anything we would eat. I will have to deal with them in the garden, before it is time to plant the fall garden, in Octber. These ant bites felt more like a sting rather than a bite and got infected, on my arms where they bit me, but I wash my hands so often during the day, that they just itched a lot. I use baking soda and vinegar to unclog the plumbing drains in the house, but I never thought of using it on ant hills. I was thinking of boiling water or DE in the veggie garden and orchard? I had ducks and geese in the garden, grazing on the weeds, but they did not seem to get bit, except for two ducks that got a swollen foot and I did not know, at the time, about the ants, so I thought it was a stone bruise or that they had steped on a bee. I lanced the foot with a needle and drew out several cc's of bloody fluid, after that, I injected the foot with a general antibiotic and they were fine in a couple of days. If they come back on the fields, I thought about burning them out with a propane torch! My husband called them "piss ants". That is what people around here call these little tiny ants that make blisters when they "bite" you, but I am sure that is not the correct name for them. I appreciate all the great info and if you think of anything Else to use in an organic veggie garden, please let me know. Thanks again and God Bless,
Celie