Hardhead (English Wikipedia)

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

Last modified: 04:20:48, 30 June 2026 (UTC)

Ref.Un. Ref.Website

Global rank English rank

low place

2^nd place

39^th place

71^st place

1^st place

low place

15^th place

8^th place

birdlife.org.au (Global: low place; English: low place)

"Hardhead: Aythya australis". Birdlife Australia. Archived from the original on 18 March 2022. Retrieved 9 February 2021.

"Hardhead: Aythya australis". Birds in backyards. Birdlife Australia. Retrieved 9 February 2021.

BirdLife International (2017). "Aythya australis". IUCN Red List of Threatened Species. 2017 e.T22680387A112385790. doi:10.2305/IUCN.UK.2017-1.RLTS.T22680387A112385790.en. Retrieved 12 November 2021.
Carboneras, C.; Kirwan, G.M. (2020). Del Hoyo, Josep; Elliott, Andrew; Sargatal, Jordi; Christie, David; De Juana, Eduardo (eds.). "Hardhead: Aythya australis". Birds of the World. Cornell Lab of Ornithology. doi:10.2173/bow.wheduc1.01. S2CID 226085401.

Carboneras, C.; Kirwan, G.M. (2020). Del Hoyo, Josep; Elliott, Andrew; Sargatal, Jordi; Christie, David; De Juana, Eduardo (eds.). "Hardhead: Aythya australis". Birds of the World. Cornell Lab of Ornithology. doi:10.2173/bow.wheduc1.01. S2CID 226085401.

"Hardhead: Aythya australis". Birdlife Australia. Archived from the original on 18 March 2022. Retrieved 9 February 2021.