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
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