Summary
At the Third Meeting of the Advisory Committee (AC3), 129 species of Procellariformes were assessed using a number of categories in order to provide Parties with an approximate priority list of species that might be considered for nomination to Annex 1 of ACAP (AC3 Doc 18). Following discussions at AC8, six of the original eight categories were retained (Global conservation status (IUCN), Listing within the Convention on Migratory Species (CMS), Level of endemism, Migratory nature, Land based threats, and At-sea threats), and the amended scoring system was adopted by the Fifth Session of the Meeting of Parties (MoP5 Doc 21). Subsequent to MoP5, the at-sea threats and migratory nature scores for all species were reviewed (SBWG7 Doc 25). The review recommended updates to those scores for 15 species, and noted the need for clarification regarding the categorization of at-sea threats, as well as the overlap between some of the categories. AC8 also asked the Taxonomy Working Group (TWG) to recommend a standard taxonomy to be used when considering new species for Annex 1 and for other ACAP purposes. At AC10, the TWG recommended the use of the International Ornithological Congress (IOC) listing based on its use of the widest evidence base and peer review process (AC10 Doc 22 Rev 1). AC10 endorsed this recommendation and advised MoP6 accordingly. The taxonomic treatment used currently for species already listed on Annex 1 remains unchanged (Thalassarche steadi remains on the list as a full species).