By Matt Tillett from Cumberland, MD, USA (Northern Bobwhite) [CC BY 2.0 (http://creativecommons.org/licenses/by/2.0)], via Wikimedia Commons
North and central America. Much of the eastern half of the US as several races, from the Great Lakes southward into Mexico. (Introduced to many countries around the world).
Known from Cambridgeshire where it was last reported breeding in 2010.