Colorado Desert Sidewinder

Crotalus cerastes laterorepens

''Crotalus cerastes laterorepens'', with the common name Colorado Desert sidewinder, is a venomous pitviper subspecies found in an area that centers on the Sonoran Colorado Desert in Southern California. It is also native to the Sonoran Desert in the Southwestern United States and Northwestern Mexico.
A Colorado Desert Sidewinder hunkered down in the sand I walked past this and two others in a span of about twenty minutes. At least, those three rattled at me. Maybe I walked past more that didn't rattle. Colorado Desert sidewinder,Crotalus cerastes laterorepens,Geotagged,Summer,United States

Appearance

This form of ''Crotalus cerastes'' has the following distinguishing characteristics: the proximal rattle-matrix lobe is black in adult specimens, the ventral scales number 137-151/135-154 in males/females, the subcaudals number 19-26/14-21 in males/females, and there are usually 23 rows of midbody dorsal scales.

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Taxonomy
KingdomAnimalia
DivisionChordata
ClassReptilia
OrderSquamata
FamilyViperidae
GenusCrotalus
SpeciesC. cerastes
Photographed in
United States of America