Portal:Snakes
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The Snake PortalSnakes are elongated, limbless reptiles of the suborder Serpentes (/sɜːrˈpɛntiːz/). Like all other squamates, snakes are ectothermic, amniote vertebrates covered in overlapping scales. Many species of snakes have skulls with several more joints than their lizard ancestors, enabling them to swallow prey much larger than their heads (cranial kinesis). To accommodate their narrow bodies, snakes' paired organs (such as kidneys) appear one in front of the other instead of side by side, and most have only one functional lung. Some species retain a pelvic girdle with a pair of vestigial claws on either side of the cloaca. Lizards have independently evolved elongate bodies without limbs or with greatly reduced limbs at least twenty-five times via convergent evolution, leading to many lineages of legless lizards. These resemble snakes, but several common groups of legless lizards have eyelids and external ears, which snakes lack, although this rule is not universal (see Amphisbaenia, Dibamidae, and Pygopodidae). Living snakes are found on every continent except Antarctica, and on most smaller land masses; exceptions include some large islands, such as Ireland, Iceland, Greenland, and the islands of New Zealand, as well as many small islands of the Atlantic and central Pacific oceans. Additionally, sea snakes are widespread throughout the Indian and Pacific oceans. Around thirty families are currently recognized, comprising about 520 genera and about 3,900 species. They range in size from the tiny, 10.4 cm-long (4.1 in) Barbados threadsnake to the reticulated python of 6.95 meters (22.8 ft) in length. The fossil species Titanoboa cerrejonensis was 12.8 meters (42 ft) long. Snakes are thought to have evolved from either burrowing or aquatic lizards, perhaps during the Jurassic period, with the earliest known fossils dating to between 143 and 167 Ma ago. The diversity of modern snakes appeared during the Paleocene epoch (c. 66 to 56 Ma ago, after the Cretaceous–Paleogene extinction event). The oldest preserved descriptions of snakes can be found in the Brooklyn Papyrus. (Full article...) Selected article - show anotherThe forest cobra (Naja melanoleuca), also commonly called the black cobra and the black and white-lipped cobra, is a species of highly venomous snake in the family Elapidae. The species is native to Africa, mostly the central and western parts of the continent. It is the largest true cobra species with a record length of 3.2 metres (10 feet 6 inches). Although it prefers lowland forest and moist savanna habitats, this cobra is highly adaptable and can be found in drier climates within its geographical range. It is a very capable swimmer and is often considered to be semi-aquatic. The forest cobra is a generalist in its feeding habits, having a highly varied diet: anything from large insects to small mammals and other reptiles. This species is alert, nervous and is considered to be a medically significant snake. When cornered or molested, it will assume the typical cobra warning posture by raising its fore body off the ground, spreading a narrow hood, and hissing loudly. Bites to humans are less common than from other African cobras due to various factors, though a bite from this species is a life-threatening emergency. (Full article...)Did you know (auto-generated) - load new batch
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Quality ContentFeatured snake-related articles - George Went Hensley - List of snakes of Trinidad and Tobago Good snake-related articles - Agkistrodon piscivorus - Bitis arietans - Bitis gabonica - Black mamba - Black-necked spitting cobra - Eastern green mamba - Forest cobra - Hydrophiinae - Many-banded krait - Nerodia clarkii - Russell's viper - Snake scales - Vipera berus - Western green mamba General imagesThe following are images from various snake-related articles on Wikipedia.
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TopicsLists - List of snakes by common name - List of Serpentes families - List of snake genera - List of dangerous snakes
Families - Acrochordidae - Aniliidae - Anomochilidae - Boidae - Bolyeriidae - Colubridae - Cylindrophiidae - Elapidae - Loxocemidae - Pythonidae - Tropidophiidae - Uropeltidae - Viperidae - Xenopeltidae - Anomalepididae - Leptotyphlopidae - Typhlopidae Anatomy and physiology - Infrared sensing in snakes - Pelvic spur - Snake scales - Snake skeleton SubcategoriesRelated portalsNeed help?Do you have a question about Snakes that you can't find the answer to? Consider asking it at the Wikipedia reference desk. Snakes in the newsNo recent news Things you can do
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