Albino gaur or white bison are a type of gaur, occasionally seen in the Manjampatti Valley, a 110.9 km2 (42.8 sq mi) protected area at the eastern end of Indira Gandhi Wildlife Sanctuary and National Park in Coimbatore District, Tamil Nadu, South India. They are occasionally called Manjampatti white bison (Tamil: காட்டேணி kaatteni, or kaattu maadu, meaning "forest cow"). These gaur are notable for their distinctive ash-grey color as opposed to the almost black color of most gaur. Since 1929, there have been at least 19 documented sightings of these rare animals, including the 2004 photographs of N. A. Naseer.