Thus, although hard proof is lacking, but given the extent of possible habitat and the precautionary principle, it is believed to be extant for the time being. Apparently at least the wintering range has starkly contracted; it appears that the handful of family or neighbour groups that are left retreat to remote habitat in southeastern Europe in winter. The IUCN classifies it as Critically Endangered (CR) C2a(ii); D. This means that an estimated 50 mature birds or fewer are believed to exist, with numbers declining, and that there probably is only one subpopulation.