Hi @Mike, There are two species of mound building termites in the ACT. In the higher, colder parts of the ACT, Coptotermes lacteus, the Milk Termite, builds a very hard, strong mound. Some of these mounds can also be seen on Black Mt, and, more rarely, other lowland sites. In the lower, warmer areas of the ACT (below about 850m) the vast majority of mounds are of Nasutitermes exitiosus, which is in the Gluegun Termite genus. These mounds are softer so that if you kick one it will leave a visible mark or even a depression. There are other distinguishing features as well but hardness is the best.
The soldier termites are also easy to distinguish. Coptotermes soldiers have clearly visible jaws. Nasutitermes soldiers have a 'gluegun' snout, appearing to form a smooth sharp protrusion, with no visible jaws (except under magnification).