[20] This tendency to freeze most likely evolved because of the extreme effectiveness of their camouflage. In a specimen described by Livezey (1949) from Walker County, Texas, 11 of 17 crossbands were not joined middorsally, while on one side, three of the crossbands were fused together longitudinally to form a continuous, undulating band, surmounted above by a dark stripe that was 2.0–2.5 scales wide. Telotorniti e Boomslang (vedi schede) gonfiano il collo in modo diverso dai cobra, accentuandone il diametro in senso verticale. Wikispecies has an entry on: Agkistrodon contortrix. Agkistrodon contortrix pictigaster is a venomous pit viper subspecies [2] found in the Trans-Pecos region of the United States in western Texas, and northeastern Mexico. The snake is a strong swimmer and has even been seen swimming in the ocean. La testa, la cui parte superiore è color rame, come il nome suggerisce, soprattutto nelle sottospecie “settentrionale” e “a bande larghe”, è triangolare e distinguibile dal collo, l’occhio ha pupilla ellittica verticale, che suggerisce abitudini crepuscolari e notturne, anche se non è raro vedere questi serpenti attivi durante il giorno. [1] This means that relative to many other species, it is not at risk of extinction in the near future. The species can be difficult to distinguish from the Broad-banded Copperhead, "A. c. laticinctus". Their choice of habitat is the driest among the copperhead subspecies, preferring rocky, lightly vegetated, canyon areas.

Their diet consists of primarily lizards, frogs, and rodents. Allf BC, Durst PA, Pfennig DW (2016). OK. [citation needed] Copperhead venom has an estimated lethal dose around 100 mg, and tests on mice show its potency is among the lowest of all pit vipers, and slightly weaker than that of its close relative, the cottonmouth.

The species can be difficult to distinguish from the broad-banded copperhead, A. c. laticinctus. Their choice of habitat is the driest among the copperhead subspecies, preferring rocky, lightly vegetated, canyon areas. Gloydius is a genus of venomous pitvipers endemic to Asia, also known as Asian moccasins or Asian ground pit vipers. Questi rettili hanno le squame ricoprenti il corpo leggermente carenate, e quelle anali sono singole, e non sdoppiate come in altre specie, e sono di lunghezza media, tra i 50 e i 90 cm anche se vi sono reports di ben 130 cm. In Mexico, it occurs in Chihuahua and Coahuila. It has also shown fondness for large insects and frogs, and though highly terrestrial, has been known to climb trees to gorge on emerging cicadas. During the winter, it hibernates in dens or limestone crevices, often together with timber rattlesnakes and black rat snakes. These crossbands are light tan to pinkish-tan to pale brown in the center, but darker towards the edges. :"Common names: Trans-Pecos copperhead. They give birth to live young, each of which is about 20 cm (7.9 in) in total length. They are commonly called copperheads or Australian copperheads. Habitat, variations & intergradation of the Trans Pecos copperhead Agkistrodon contortrix pictigaster in Texas. Agkistrodon contortrix pictigaster is a venomous pitviper subspecies [2] found in the Trans-Pecos region of the United States , in western Texas , and northeastern Mexico . Agkistrodon contortrix pictigaster is a venomous pitviper subspecies found in the Trans-Pecos region of the United States, in western Texas, and northeastern … that feed on venomous copperheads. They grow to approximately 20-36 inches in length.

They are ovoviviparous, giving birth to a litter of up to 8 young in the early fall. La punta della coda, invece, è giallo tenue. [13], Common names for A. contortrix include: copperhead (snake), chunk head, highland moccasin, (dry-land) moccasin, narrow-banded copperhead, northern copperhead, pilot snake, poplar leaf, red oak, red snake, southeastern copperhead, white oak snake,[14] American copperhead,[15] southern copperhead,[13] and cantil cobrizo (Spanish). Agkistrodon contortrix is a species of venomous snake, a pit viper, endemic to Eastern North America; it is a member of the subfamily Crotalinae in the family Viperidae. Some may exceed 1 m (3.3 ft), although that is exceptional for this species. [citation needed] Copperheads often employ a "warning bite" when stepped on or agitated and inject a relatively small amount of venom, if any at all. https://it.wikipedia.org/w/index.php?title=Agkistrodon_contortrix&oldid=111374278, licenza Creative Commons Attribuzione-Condividi allo stesso modo. Like most other New World vipers, copperheads exhibit defensive tail vibration behavior when closely approached. → Per apprezzare la biodiversità dei SERPENTI cliccare qui. They are ovoviviparous, giving birth to a litter of up to 8 young in the early fall. Pain management, tetanus immunization, laboratory evaluation, and medical supervision in the case of complications are additional courses of action.

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