247:, is genetically distinct from related mainland snakes and should be recognized as a full species. While never formally declared extinct, this species remained absent from scientific literature due to two main factors: its home on Clarion is extremely remote and only accessible by military escort, significantly restricting the number of biologists who can access this area, and the snake's secretive, nocturnal behavior and dark coloration make it difficult to detect in the field. Because of the lack of follow-up sightings, scientists long presumed that Beebe had provided an incorrect locality for his specimen.
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in 1936. During the next several decades, scientists were unable to detect any trace of the snake in their field studies. After an intensive search in 2013, a team of scientist identified 11 snakes that matched the original description of the species. They conducted a series of DNA tests to confirm
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The Islas
Revillagigedo nightsnake is believed to be most closely related to populations of snakes from in the Sonora-Sinaloa state border area of mainland Mexico and Isla Santa Catalina in the Gulf of California. The Clarion nightsnake likely originated from the dispersal of an ancestor that
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While current populations of this species appear to be viable, Clarion's fragile ecosystem is threatened by invasive species such as feral cats on neighboring islands. These cats prey on lizards, which are likely a main food source for the
Clarion nightsnake.
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The snakes are brownish black in color and have a characteristic series of darker spots on their head and neck and grows to be approximately 18 inches long.
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362:"Rediscovery of an Endemic Vertebrate from the Remote Islas Revillagigedo in the Eastern Pacific Ocean: The Clarión Nightsnake Lost and Found"
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News
Releases, Smithsonian Scientist Discovers Lost Species of Nightsnake in Mexico, The Smithsonian, May 19, 2014
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Mulcahy, D. G.; Martínez-Gómez, J. E.; Aguirre-León, G.; Cervantes-Pasqualli, J. A.; Zug, G. R. (2014-05-16).
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that the Islas
Revillagigedo nightsnake, formerly viewed as the subspecies
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It lives on black lava rock habitat near the waters of
Sulphur Bay.
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The species is only found on the
Mexican island of Clarion in the
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traveled by sea from a river basin in Sonora to
Clarion.
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298:Location of Clarion Island in the Pacific Ocean
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586:Natural history of the Revillagigedo Islands
422:"Lost snake species rediscovered in Mexico"
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185:Hypsiglena ochrorhyncha unaocularus
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211:Islas Revillagigedo night snake
195:Hypsiglena torquata unaocularus
596:Taxa named by Wilmer W. Tanner
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389:10.1371/journal.pone.0097682
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591:Reptiles described in 1946
581:Endemic reptiles of Mexico
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41:Scientific classification
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209:, commonly known as the
487:Hypsiglena unaocularus
457:Hypsiglena unaocularis
206:Hypsiglena unaocularus
160:Hypsiglena unaocularus
428:. London. 19 May 2014
265:Revillagigedo Islands
295:class=notpageimage|
380:2014PLoSO...997682M
321:Conservation status
243:Hypsiglena torquata
215:Clarión night snake
142:H. unaocularus
35:Clarion nightsnake
18:Clarion nightsnake
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449:Taxon identifiers
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189:W.W. Tanner, 1944
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553:unaocularus
509:iNaturalist
481:Wikispecies
251:Description
245:unaocularis
167:W.W. Tanner
576:Hypsiglena
570:Categories
432:2014-05-27
330:References
129:Hypsiglena
118:Colubridae
104:Suborder:
472:Q16983484
221:of small
136:Species:
108:Serpentes
64:Kingdom:
58:Eukaryota
466:Wikidata
426:BBC News
408:24837300
367:PLoS ONE
223:colubrid
176:Synonyms
114:Family:
98:Squamata
88:Reptilia
78:Chordata
74:Phylum:
68:Animalia
54:Domain:
527:1486644
501:9253666
399:4023976
376:Bibcode
312:Origins
304:Habitat
287:Clarión
229:endemic
219:species
217:, is a
124:Genus:
94:Order:
84:Class:
540:938351
514:539838
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169:, 1946
226:snake
522:NCBI
496:GBIF
404:PMID
394:PMC
384:doi
231:to
213:or
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
