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Chionactis occipitalis annulata. (Baird, 1859) Sonora annulata, also known commonly as the Colorado Desert shovelnose snake, is a species of snake in the subfamily Colubrinae of the family Colubridae. [1] The species is native to the southwestern United States and adjacent northwestern Mexico. There are two recognized subspecies.
Long-nosed snake Colubridae: Sonora semiannulata: Western Ground snake Colubridae: Tantilla hobartsmithi: Southwestern blackhead snake Colubridae: Tantilla nigriceps * Plains blackhead snake Colubridae: Thamnophis cyrtopsis: Blackneck garter snake Colubridae: Thamnophis elegans: Western terrestrial Garter snake Colubridae: Thamnophis proximus ...
The United States in the Great Basin region. Its range includes Idaho south of lat. 44° North, Utah west of long. 111° West, Arizona west and north of the Colorado River as well as the north rim of the Grand Canyon, the entire state of Nevada (excluding Esmeralda, Nye and Clark counties), California east of the Sierra Nevada from Lower Klamath Lake south to below Lake Mono, Oregon south and ...
The western diamondback rattlesnake[ 3 ] or Texas diamond-back[ 4 ] (Crotalus atrox) is a rattlesnake species and member of the viper family, found in the southwestern United States and Mexico. Like all other rattlesnakes and all other vipers, it is venomous. It is likely responsible for the majority of snakebite fatalities in northern Mexico ...
Sunbeam snake (Xenopeltis unicolor) Scolecophidia 3 families Family Common Names Example Species Example Photo Anomalepidae Taylor, 1939: Dawn blind snakes: Dawn blind snake (Liotyphlops beui) Leptotyphlopidae Stejneger, 1892: Slender blind snakes: Texas blind snake (Leptotyphlops dulcis) Typhlopidae Merrem, 1820: Blind snakes
Sistrurus tergeminus edwardsii, also known as the desert massasauga, is a subspecies of venomous pit viper [3] in the family Viperidae. The subspecies is endemic to the Southwestern United States and northern Mexico. In places, its range overlaps that of S. t. tergeminus, and intergrading of the two subspecies is known.
Colorado Desert sidewinder. 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. [4]
Clonophis, Coluber, Ischnognathus, Natrix, Regina, Storeria, Tropidoclonion, Tropidonothus, Tropidonotus, Vipera. Nerodia is a genus of nonvenomous colubrid snakes commonly referred to as water snakes due to their aquatic behavior. The genus includes nine species, all native to North America. Five of the species have recognized subspecies.