The link in the first post is a just a summary of the IUCN Red List data-sheet. These are just ‘attention grabbing summaries’ that are replaced regularly on the web-site to provide fresh content. You should really read the actual data sheet at:- http://www.iucnredlist.org/details/63562 for a more accurate picture, which will also answer some to the questions that people have levied.
The IUCN funds a lot of local studies and surveys that you don’t and wont see published in mainstream journals – they’re produced as private reports that you can only inspect at IUCN libraries (the UK one is in Cambridge somewhere). Pertinent information is summarized in the data-sheets. So, data is not drawn from thin air. Doubting the accuracy of the studies/surveys on which the data-sheets are based is another matter.
While I agree in essence with Richard Gallons’ comments, the categorisation of inverts in particular, is a major headache and more an ‘educated guess’ than a formal application of criteria. Personally the more public awareness/attention that inverts are given in this way the better.
The IUCN funds a lot of local studies and surveys that you don’t and wont see published in mainstream journals – they’re produced as private reports that you can only inspect at IUCN libraries (the UK one is in Cambridge somewhere). Pertinent information is summarized in the data-sheets. So, data is not drawn from thin air. Doubting the accuracy of the studies/surveys on which the data-sheets are based is another matter.
While I agree in essence with Richard Gallons’ comments, the categorisation of inverts in particular, is a major headache and more an ‘educated guess’ than a formal application of criteria. Personally the more public awareness/attention that inverts are given in this way the better.
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