Radford, A. P & Tyler, S. J / June 1994 – vol. 87, issue 6, pp 271–276 Hazel Grouse in the Pyrenees. Since the French breeding bird atlas (Yeatman 1976), the Hazel Grouse Bonasa bonasia has been considered nonexistent in the Pyrenees (Elosegui 1985; CROAP 1987). It is true, however, that its secretive nature and habitat preference make it difficult to observe. In spite of this negative general belief, a survey was started in 1976. All information and reported si... This article is only available to registered users.To read more, please log in or purchase a subscription.