By Dick Daniels (http://carolinabirds.org/) (Own work) [CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0) or GFDL (http://www.gnu.org/copyleft/fdl.html)], via Wikimedia Commons
Europe and Asia. Resident in central southern Spain and patchily distributed eastwards. The main population is in southern Russia and Kazakhstan where large numbers were discovered in 2016.
All occurences in Britain were presumed to be escapes and the species was on category E but there is considered to be a possibility that some records might refer to wild individuals and the White-headed Duck was moved to category D. It is kept at several locations around the country and recent sightings of the species in the wild have been in Lndon, Berkshire and Cheshire.