The habitat is better for Nubian, I think - Egyptian is rarely found away from trees, even if there are only a few and they NEVER perch in them, or too far from water. They can also winter in plains with some grass, e.g. in Sudan. Here in the UAE they are most often found in farmland or desert areas with scattered trees. Mark's description of the habitat the bird was seen in matches the description in HBW - "typically dry, sparsely vegetated wadis".