Northern red-billed hornbill (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Northern red-billed hornbill" in English language version.

refsWebsite

Global rank English rank

1iucnredlist.org

88^th place

160^th place

2^nd place

2^nd place

3,128^th place

4,193^rd place

doi.org

BirdLife International (2016). "Tockus erythrorhynchus". IUCN Red List of Threatened Species. 2016: e.T22725930A94906468. doi:10.2305/IUCN.UK.2016-3.RLTS.T22725930A94906468.en. Retrieved 19 November 2021.

hbw.com

"Red-billed Hornbill". www.hbw.com. Handbook of Birds of the World online. Retrieved 12 May 2018.

iucnredlist.org

BirdLife International (2016). "Tockus erythrorhynchus". IUCN Red List of Threatened Species. 2016: e.T22725930A94906468. doi:10.2305/IUCN.UK.2016-3.RLTS.T22725930A94906468.en. Retrieved 19 November 2021.