It is based on a report by this group: https://www.ipbes.net/ https://www.ipbes.net/ The report will be published "later this year." You can access a "summar

It is based on a report by this group: https://www.ipbes.net/ https://www.ipbes.net/ The report will be published "later this year." You can access a "summary for policy makers" from this press release: https://www.ipbes.net/news/Media-Release-Global-Assessment https://www.ipbes.net/news/Media-Release-Global-Assessment Edit: The summary for policy makers indicates that species extinction estimates are based on data maintained here: https://www.iucnredlist.org/ https://www.iucnredlist.org/