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| {{Short description|Subspecies of ridge-nosed rattlesnake from the Americas}} | {{Short description|Subspecies of ridge-nosed rattlesnake from the Americas}} | ||
| {{Subspeciesbox | {{Subspeciesbox | ||
| | image = Crotalus willardi silus 433445.jpg | |||
| | genus = Crotalus | | genus = Crotalus | ||
| | species_link = Crotalus willardi | | species_link = Crotalus willardi | ||
Revision as of 02:30, 9 January 2025
Subspecies of ridge-nosed rattlesnake from the Americas
| Crotalus willardi silus | |
|---|---|
| |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Order: | Squamata |
| Suborder: | Serpentes |
| Family: | Viperidae |
| Genus: | Crotalus |
| Species: | C. willardi |
| Subspecies: | C. w. silus |
| Trinomial name | |
| Crotalus willardi silus Klauber, 1949 | |
Crotalus willardi silus, the Western Chihuahuan Ridge-nosed Rattlesnake, is a subspecies of ridge-nosed rattlesnake native to Mexico and the USA. As with all rattlesnakes, it is venomous.
Description
C. w. silus is recognisable as it has less conspicuous markings than its sister subspecies. Its head is brown with irregular dark spots, it has a dark ocular band starting dark brown at the corner of the eyes and fades to grey as it reaches the end of the supralabials and the front of the head is usually grey. It lacks the facial markings seen in other subspecies of C. willardi.
Dorsally, the snake is brown or red with blotched and dotted with brown markings. Its rattle is dark brown and rounded, with sharp scales as a sheath for it, as is characteristic of the species.
It is also a smaller snake, measuring up to 63.6 cm (25 in).
Diet
C. w. silus has been recorded to eat rodents.
Reproduction
C. w. silus is known to be ovoviviparous.
References
- ^ "Crotalus willardi". The Reptile Database. Retrieved 2025-01-08.
- Van Devender, Thomas R.; Lowe, Charles H. (1977). "Amphibians and Reptiles of Yepómera, Chihuahua, Mexico". Journal of Herpetology. 11 (1): 41–50. doi:10.2307/1563290. ISSN 0022-1511.
- ^ San Diego Society of Natural History.; History, San Diego Society of Natural (1946). Transactions of the San Diego Society of Natural History. Vol. v.11 (1946-1953). : The Society.
- Brigham Young University.; University, Brigham Young; University, Brigham Young; Museum, M. L. Bean (1985). The Great Basin naturalist. Vol. v.45 (1985). Provo, Utah: M.L. Bean Life Science Museum, Brigham Young University.
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