Plains black-headed snake (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Plains black-headed snake" in English language version.

refsWebsite

Global rank English rank

1iucnredlist.org

88^th place

160^th place

2^nd place

2^nd place

1,245^th place

1,158^th place

6^th place

6^th place

1tucsonherpsociety.org

low place

low place

1reptilesofaz.org

low place

low place

archive.org

Behler, John L. & King, F. Wayne (1979). National Audubon Society Field Guide to North American Reptiles and Amphibians. Alfred A. Knopf, Inc. pp. 658-659. ISBN 0-394-50824-6.

doi.org

Frost, D.R.; Hammerson, G.A.; Santos-Barrera, G. (2007). "Tantilla nigriceps". IUCN Red List of Threatened Species. 2007: e.T63952A12731085. doi:10.2305/IUCN.UK.2007.RLTS.T63952A12731085.en. Retrieved 19 November 2021.

iucnredlist.org

Frost, D.R.; Hammerson, G.A.; Santos-Barrera, G. (2007). "Tantilla nigriceps". IUCN Red List of Threatened Species. 2007: e.T63952A12731085. doi:10.2305/IUCN.UK.2007.RLTS.T63952A12731085.en. Retrieved 19 November 2021.

reptarium.cz

reptile-database.reptarium.cz

Tantilla nigriceps at the Reptarium.cz Reptile Database. Accessed 13 February 2020.

reptilesofaz.org

Brennan, Thomas. "Plains Black-headed Snake (Tantilla nigriceps) - Reptiles of Arizona". www.reptilesofaz.org.

tucsonherpsociety.org

Rorabaugh, Jim. "Plains Black-headed Snake (Tantilla nigriceps)". tucsonherpsociety.org. Retrieved 10 February 2020.