Y gwahaniaeth rhwng diwygiadau o "Rhestr Goch yr IUCN"

Ychwanegwyd 1,182 beit ,  4 o flynyddoedd yn ôl
Fersiwynau
(lle)
(Fersiwynau)
 
Wrth drafod y Rhestr Goch yr IUCN, mae'r term "Dan Fygythiad" yn cwmpasu 3 chategori: Rhywogaeth mewn perygl difrifol, Mewn perygl, a Bregus.
 
==Fersiynau==
Ers 1991 cafwyd sawl fersiwn o'r Rhestr Goch, gan gynnwys:<ref>{{cite web|url=http://www.iucnredlist.org//static/categories_criteria_3_1#introduction |title=2001 Categories & Criteria (version 3.1) |publisher=IUCN |accessdate=27 Ionawr 2013 |deadurl=unfit |archiveurl=https://web.archive.org/web/20140627094911/http://www.iucnredlist.org//static/categories_criteria_3_1#introduction |archivedate=27 Mehefin 2014 }}</ref><ref>{{cite web|title=Historical IUCN Red Data Books and Red Lists |url=http://www.iucnredlist.org//about/publication/historical-red-lists#red_lists |accessdate=9 Mehefin 2016 |deadurl=unfit |archiveurl=https://web.archive.org/web/20140627094911/http://www.iucnredlist.org//about/publication/historical-red-lists#red_lists |archivedate=27 Mehefin 2014 }}</ref>
 
* Fersiwn sion 2.0 (1992)
* Fersiwn 2.1 (1993)
* Fersiwn 2.2 (1994)
* Fersiwn 2.3 (1994)
* Fersiwn 3.0 (1999)
* Fersiwn 3.1 (2001)
* Fersiwn 4 (2015)
 
Y rhestr bwysicaf o ran [[planhigion]] yw Fersiwn 1997.<ref>{{cite web|title=Which IUCN list should I choose?|url=http://www.bgci.org/worldwide/which_iucn_list/|publisher=Botanic Gardens Conservation International}}</ref>1.0 (1991)
 
==Gweler hefyd==