September 2015 – vol. 108, issue 9, pp 514–539 By Marcel Gil-Velasco, Guillermo RodrÃguez, Stephen Menzie and JosÃ© Manuel Arcos Abstract Three medium-sized Puffinus shearwaters breed in Europe: Manx P. puffinus, Yelkouan P. yelkouan and Balearic Shearwaters P. mauretanicus. These three, considered a single, polytypic species until relatively recently, can be difficult to identify in some situations, notably in a vagrant context. This... This article is only available to registered users.To read more, please log in or purchase a subscription.