小天鹅 (Chinese Wikipedia)

Analysis of information sources in references of the Wikipedia article "小天鹅" in Chinese language version.

refsWebsite

Global rank Chinese rank

1iucnredlist.org

88^th place

102^nd place

1,611^th place

173^rd place

gbif.org

Cygnus columbianus. GBIF. Copenhagen, Denmark: GBIF Secretariat. [30 September 2021].

iucnredlist.org

apiv3.iucnredlist.org

BirdLife International. Cygnus columbianus. The IUCN Red List of Threatened Species 2016. [1 October 2016]. 数据库資料包含說明此物種被編入無危級別的原因