Contopus nigrescens (Bulgarian Wikipedia)

Analysis of information sources in references of the Wikipedia article "Contopus nigrescens" in Bulgarian language version.

refsWebsite

Global rank Bulgarian rank

88^th place

4^th place

iucnredlist.org

Contopus nigrescens (P.L. Sclater & Salvin, 1880). // IUCN Red List of Threatened Species. International Union for Conservation of Nature. Посетен на 27 декември 2021 г. (на английски)
Contopus nigrescens // IUCN Red List of Threatened Species. Version 2015.4. International Union for Conservation of Nature, 2015. Посетен на 24 февруари 2016. (на английски)