The herd definition is done through where the animals, the females go to calve. There has been DNA work on the herds and there are differences, apparently. But they aggregate to calve in the same areas and there are calving grounds established, usually up along the Arctic Coast. In the collared animals that they do have, they show very great fidelity to going back to the same areas. As we have our work and methodology reviewed by the Alberta Research Council, the science in the circumpolar world that deals with caribou has some fairly standard methodology when it comes to defining herds that way.