Spencer, R & Trolliet, B / July 1977 – vol. 70, issue 7, pp 301–305 Half a pair of Black-browed Albatrosses In the course of their discussion of proof of breeding (Brit. Birds 69: 277, 457), Bruce Campbell and E. J. M. Buxton omitted to comment on one important consideration: the conservation status of potential breeders. If their requirement for a fertile embryo is pushed too far, I foresee the day when egg-collectors will plead in court that their eggs of Blu... This article is only available to registered users.To read more, please log in or purchase a subscription.