Termites can come in all shapes and sizes so sometimes it is hard to termine how well established a termite nest is, and therefore it can be very difficult to tell if you have a full on termite infestation where you would need a professional terminator or in the early stages where you can handle the problem yourself. However one of the tell tale signs of a termite infestation is the identification of termites with wings. This means that the termites have established a pretty mature nest and are probably eating away at the wood in your house.
As soon as you see that termite with wings hanging out in your house, especially if you see multiple of them, you should immediate perform the wall test. This test is relatively easy start knocking on the wooden walls of your home. A healthy, non infested termite home will sound very solid when you knock on the wood because there will be wood reinforcing the plaster. However as soon as the termites start doing structural damage to your home you will hear a hollow sound behind when banging on the walls. This is a tell tale sign of a termite infestation. Termite damage is usually seen when wood starts to be eaten away by the termites. The hollow sound your hearing is a sign that there is no more wood reinforcing the walls, which if bad enough could cause massive structural damage to your home.
Another tell tale sign of a termite infestation is seeing very small holes in your walls. These holes are signs that the termites have started to burrow into your walls and making nests. The holes will usually be filled with small shavings of wood where the termites have started to hollow our your home. Yet another way to indentify termite damage is to find termite pellets. These are also where the termite has chewed up the wood and has spit out the extra. These pellets if given the chance will start to pile up on the floor. However be aware that carpenter bees also make very similar looking pellet mounds. However if the damage is being caused by a termite then the entry hole will be much smaller than that of the carpenter bee.