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Andy Purvis Profile picture
Andy Purvis
@AndyPurvisNHM
Biodiversity researcher at NHM & Imperial College. #PredictsProject, #macroevolution, #biodiversity, comparative biology, #IPBES #GlobalAssessment
May 8, 2019 • 14 tweets • 5 min read
[1] Let me explain it for you in this thread. @IUCNRedList and their many partner organisations have been producing detailed assessments of species extinction risk in different taxonomic groups since 1994 (when the first comprehensive #RedList assessment of birds came out) [2] Obviously we can't be at all sure that birds are typical, so it would have been wildly unsafe to go from "14% of birds are threatened" to "14% of all species are threatened". Since then, @IUCNRedList assessments have been done for an ever-expanding set of taxonomic groups...