Geronticus calvus (Italian Wikipedia)

Analysis of information sources in references of the Wikipedia article "Geronticus calvus" in Italian language version.

refsWebsite

Global rank Italian rank

1iucnredlist.org

88^th place

77^th place

6^th place

8^th place

archive.org

Ian Sinclair, Hockey, Phil; Tarboton, Warwick, SASOL Birds of Southern Africa, Cape Town, Struik, 2002, ISBN 1-86872-721-1.

iucnredlist.org

apiv3.iucnredlist.org

(EN) BirdLife International 2008, Geronticus calvus, su IUCN Red List of Threatened Species, Versione 2020.2, IUCN, 2020.