Crotalus oreganus abyssus

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Crotalus oreganus abyssus
Grand Canyon pink rattlesnake.jpg
Grand Canyon rattlesnake
Havasu Canyon, Arizona
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Squamata
Suborder: Serpentes
Family: Viperidae
Genus: Crotalus
C. o. abyssus
Trinomial name
Crotalus oreganus abyssus
Klauber, 1930
  • Crotalus confluentus abyssus Klauber, 1930
  • Crotalus viridis abyssus
    – Klauber, 1936[1]
  • Crotalus oreganus abyssus
    – Ashton & de Queiroz, 2001[2]
Common names: Grand Canyon rattlesnake,[3] canyon bleached rattlesnake.[4]

Crotalus oreganus abyssus is a venomous pit viper subspecies[3] found only in the U.S. states of Arizona and Utah.


This is a medium to large rattlesnake. Adults measure 16-54 inches (41–137 cm) in total length.

Dorsally, they have dark blotches on a variety of base colors ranging from reddish, pink, yellow/green, light tan, to gray. The blotches usually become crossbands near the tail. The young usually have more prominent blotches and facial markings than the adults. Some adults have no body markings.

The rostral scale usually comes into contact with more than 2 internasal scales.

Geographic range[edit]

Found in northwestern and north-central Arizona along both rims and the floor of the Grand Canyon and adjacent areas, and North into Utah on the Kaiparowits Plateau between and along the Escalante River and Paria River Drainages of Kane and Garfield Counties, Utah.[5][6][7][8]


The snake is found in a variety of habitats, including grassland, Great Basin Desert scrubland, bottoms in the Grand Canyon, talus and cliff slopes, rolling hills and bajadas in pinion-juniper woodland, and pine forests.


It is primarily diurnal but can be active around the clock when conditions are favorable. The cryptic coloration and calm demeanor of this subspecies often allows it to escape detection from passersby.


It feeds on squirrels, mice, lizards, and birds.

See also[edit]


  1. ^ McDiarmid RW, Campbell JA, Touré T. 1999. Snake Species of the World: A Taxonomic and Geographic Reference, vol. 1. Herpetologists' League. 511 pp. ISBN 1-893777-00-6 (series). ISBN 1-893777-01-4 (volume).
  2. ^ Ashton KG, de Queiroz A. 2001. Molecular systematics of the western rattlesnake, Crotalus viridis (Viperidae), with comments on the utility of the d-loop in phylogenetic studies of snakes. Molecular Phylogenetics and Evolution, Vol. 21, No.2, pp. 176-189. PDF at CNAH. Accessed 3 September 2008.
  3. ^ a b "Crotalus oreganus abyssus". Integrated Taxonomic Information System. Retrieved 28 November 2006.
  4. ^ Wright AH, Wright AA. 1957. Handbook of Snakes. Comstock Publishing Associates. (7th printing, 1985). 1105 pp. ISBN 0-8014-0463-0.
  5. ^ Gordon W. Schuett, Martin J. Feldner, Charles F. Smith, Randall S. Reiserer. 2016. Rattlesnakes of Arizona Vol. 1. 736 pp. ISBN 1938850181 ISBN 978-1938850189.
  6. ^ Gordon W. Schuett, Charles F. Smith, Bob Ashley. 2018. Rattlesnakes of the Grand Canyon. 131 pp. ISBN 1938850580 ISBN 978-1938850585.
  7. ^ Jonathan A. Campbell, William W. Lamar. 2004. The Venomous Reptiles of the Western Hemisphere, Vols.1 & 2. 976 pp. ISBN 0801441412 ISBN 978-0801441417.
  8. ^ Brian Hubbs, Brendan O'Connor. 2012. A Guide to the Rattlesnakes and other Venomous Serpents of the US. ISBN 0975464132 132 pp. ISBN 978-0975464137.

Further reading[edit]

  • Klauber, L.M. 1930. New and Renamed Subspecies of Crotalus confluentus Say, with Remarks on Related Species. Trans. San Diego Soc. Nat. Hist.
    6 (3): 95-144, including Plates 9-12, 1 map. ("Crotalus confluentus abyssus, subsp. nov.", pp. 114–117 + Plate 11, figure 1.)

External links[edit]