Crotalus aquilus is a venomous pit viper species found in the highlands of central Mexico. No subspecies is currently recognized. The specific name, aquilus, is Latin for "eagle" and refers to the high altitude at which this species is found.
This species grows to a maximum reported total length of 67.8 cm (26.7 in), but most adult specimens, which have been described as heavy-bodied, are less than 50 cm (20 in) long.
These snakes are found in the open grassy and generally rocky habitats north of the Transverse Volcanic Cordillera. They also occur in pine-oak forest, open karstic areas, grassy mountain meadows, and stony mesquite-grassland.
This species is classified as Least Concern on the IUCN Red List (v3.1, 2001). Species are listed as such due to their wide distribution, presumed large population, or because they are unlikely to be declining fast enough to qualify for listing in a more threatened category. The population trend was down when assessed in 2007.
- List of crotaline species and subspecies
- Crotalus by common name
- Crotalus by taxonomic synonyms
- Crotalinae by common name
- Crotalinae by taxonomic synonyms
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- Campbell, J.A.; Lamar W.W. (2004). The Venomous Reptiles of the Western Hemisphere. Ithaca and London: Comstock Publishing Associates. pp. 870 pp. 1500 plates. ISBN 0-8014-4141-2..
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- "Crotalus aquilus". Integrated Taxonomic Information System. Retrieved 9 July 2007.
- Crotalus aquilus at the IUCN Red List. Accessed 13 September 2007.
- 2001 Categories & Criteria (version 3.1) at the IUCN Red List. Accessed 13 September 2007.
- Klauber, L.M. 1952. Taxonomic studies on rattlesnakes of Mainland Mexico. Bull. Zool. Soc. San Diego 26: 1-143.