At first there was one, then two and finally three. But since, like most raptor types, the first is stronger and older, the second is somewhat less stronger and a bit younger, and the third is the last to eat since it was the last hatched. So it is not uncommon for the first two and the third to perish since it is the weakest. Here we have on the left first, then second, and on the edge is the remains of the third. So now there is two with the oldest already working it's wing muscles and the parent crusing by indicating to it how to fly. Within a few days or weeks both chicks will be fledged and flying.