Black heron (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Black heron" in English language version.

refsWebsite

Global rank English rank

1iucnredlist.org

88^th place

160^th place

2^nd place

2^nd place

656^th place

1,126^th place

1ornithologiki.gr

low place

low place

doi.org

BirdLife International (2016). "Egretta ardesiaca". IUCN Red List of Threatened Species. 2016: e.T22696926A93593568. doi:10.2305/IUCN.UK.2016-3.RLTS.T22696926A93593568.en. Retrieved 12 November 2021.

itis.gov

"Egretta ardesiaca (Wagler, 1827)". Integrated Taxonomic Information System (ITIS) (https://www.itis.gov). Retrieved 2016-11-13.

iucnredlist.org

BirdLife International (2016). "Egretta ardesiaca". IUCN Red List of Threatened Species. 2016: e.T22696926A93593568. doi:10.2305/IUCN.UK.2016-3.RLTS.T22696926A93593568.en. Retrieved 12 November 2021.

ornithologiki.gr

files.ornithologiki.gr

"Hellenic Rarities Committee Annual Report – 2012" (PDF). Hellenic Ornithological Society. 2012. p. 2.