Polioptila nigriceps (Italian Wikipedia)

Analysis of information sources in references of the Wikipedia article "Polioptila nigriceps" in Italian language version.

refsWebsite

Global rank Italian rank

1iucnredlist.org

88^th place

77^th place

1worldbirdnames.org

1,007^th place

182^nd place

iucnredlist.org

apiv3.iucnredlist.org

(EN) BirdLife International 2012, Polioptila nigriceps, su IUCN Red List of Threatened Species, Versione 2020.2, IUCN, 2020.

worldbirdnames.org

(EN) F. Gill e D. Donsker (a cura di), Family Polioptilidae, in IOC World Bird Names (ver 9.2), International Ornithologists’ Union, 2019. URL consultato l'8 maggio 2014.