No, they do not aestivate, but they can enter some sort of semi-brumation state when it gets incredibly dry, in order to maintain moist. This is not necessary when breeding though, since it's more of a emergency action. However, they do need a seasonal cycle, since they breed when the rain season begins. This happens after the dry season, so need to simulate both these seasons in order to breed them, which is what we are doing right now.