Retraction: The following article from Equine Veterinary Journal, ‘Przewalski's Horses in Western China: When will reintroduction succeed?’ by X. Sheng, H. Zhang, Q. Weng, G. Watanabe and K. Taya , published online on 21 September 2011 in Wiley Online Library (, has been retracted by agreement between the authors, the journal Editor in Chief, Celia M Marr and Blackwell Publishing Ltd. The retraction has been agreed due to the identification of several errors and inaccuracies in the information presented in the article.