Agence France-Presse “Wild tiger numbers 40% higher than thought, says conservation group” https://www.theguardian.com/environment/2022/jul/22/wild-tiger-numbers-40-higher-than-thought-says-conservation-group
国際自然保護連合（IUCN）*1によれば、世界の野生の虎*2の棲息数は5,578頭で、2015年における推定3,726頭よりも40％多い。虎の個体数は増加傾向に転じている。
「レッド・リスト」の更新；
絶滅危惧種として特に強調されているのは、北米の移動性オオカバマダラ（migratory monarch butterfly[Danaus plexippus plexippus]）*3。また、野生の鱘。白鱘（Chinese paddlefish）*4の絶滅と長江鱘（Yangtze sturgeon）*5の野生における絶滅が宣告された*6。
The list assigns species to one of eight categories of threat. A total of 147,517 were assessed in the latest version, with 41,459 species deemed as being threatened with extinction.Of those, 9,065 are critically endangered, 16,094 are endangered and 16,300 are deemed vulnerable.
Established in 1964, the list counts 902 species that are now extinct, and 82 which are extinct in the wild.
See also
IUCN “Migratory monarch butterfly now Endangered - IUCN Red List” https://www.iucn.org/press-release/202207/migratory-monarch-butterfly-now-endangered-iucn-red-list
*1:https://www.iucn.org/ See also https://sumita-m.hatenadiary.com/entry/20130708/1373257262 https://sumita-m.hatenadiary.com/entry/20160909/1473436916 https://sumita-m.hatenadiary.com/entry/2021/02/06/080530
*2:See eg. https://sumita-m.hatenadiary.com/entry/20160406/1459958841 https://sumita-m.hatenadiary.com/entry/20170330/1490839553
*3:See eg. https://en.wikipedia.org/wiki/Monarch_butterfly https://ja.wikipedia.org/wiki/%E3%82%AA%E3%82%AA%E3%82%AB%E3%83%90%E3%83%9E%E3%83%80%E3%83%A9
*4:See eg. https://en.wikipedia.org/wiki/Chinese_paddlefish https://zh.wikipedia.org/wiki/%E7%99%BD%E9%B2%9F
*5:See eg. https://en.wikipedia.org/wiki/Dabry%27s_sturgeon https://zh.wikipedia.org/wiki/%E8%BE%BE%E6%B0%8F%E9%B2%9F
*6:See also Mimi Lau “Chinese paddlefish and Yangtze sturgeon declared extinct despite conservation efforts” https://www.scmp.com/news/china/politics/article/3186276/last-giants-are-gone-chinese-paddlefish-and-yangtze-sturgeon
