I live in a fairly dry farming district, and we have many really, really large and complex colonies of meat ants, also called gravel ants, endemic to Australia (Iridomyrmrex purpureus). They are usually in gravel mounds with a foraging path stretching up to half a kilometre from the mound into the surrounding area. Over the last four weeks, a small collection of gravel ants has appeared on our back concrete path, along one edge or in small clusters, apparently just going around in circles and bumping into one another, communicating, then moving on, although remaining in the same self-imposed space. If one is accidentally killed by me or my dogs, it is removed. They aren't particularly interested in anything going on around them or walking or standing near them. They just constantly churn. There is nothing on the path to attract them. As the sun goes down, they disappear and I have not been able to ascertain where they go.
I would really like to understand this behaviour, and was wondering if anyone in this forum had any idea about what they could be doing. I have posted a short video clip and a couple of images.
Thank you for any thought you can give to this.
Edited by ucaneverdonly1thing, December 5 2018 - 7:28 AM.