Abstract: Snakes are reptiles/amphibians without legs or flippers. They eat plants and animals depending on mood and availability. Snakes can be found on every landmass, but are fairly scarce on some. Their lifespans vary from a few months to over 90 years.
I) Introduction
After the positive reaction I received about my article on the Python, I thought I would present a more general treatment of the Python’s cousins: snakes. The first snake in history was mentioned in the Book of Genesis in the Bible and snakes have captured imaginations young and old ever since. Some people keep pet snakes while others hate them. By the end of this article, you will know about snakes and be able to make an informed decision.

An Adult King Cobra
II) Evolution and Biology
Have you ever seen a snake? They look like lizards except without legs. Actually, that’s pretty much all they are. How snakes evolved to not have legs is still an open question, but it is thought that modern snakes and lizards evolved from a common dinosaur ancestor. The exact species of this ancestor is also up for debate, but some serpentologists believe it most likely to have been the Tyrannosaurus Rex.
In the early 16th Century, a series of experiments were conducted by the famous physician Andreas Vesalius, during which the legs of various lizards were removed in the hope that they would learn to slither, like snakes. Unfortunately, the lizards expired before learning to slither and Vesalius retired in disgrace having not contributed any new knowledge to the medical and scientific communities. Further, these experiments were very cruel and readers should never consider repeating them. A lizard cannot be taught to slither.
The biological makeup of the modern snake varies on slightly between species. Most are about 6-8′ long[1], venomous and highly intelligent. Snakes smell with their tongues and can see infrared light and gamma rays. A king cobra, one of the most venomous snakes, can smell a mammal over 10 miles away and slither to it at over 25 m/s.
Snake’s consist of a long, muscular body, known among serpentologists as the tube. Prey can remain in the tube for over 2 weeks being digested, which is disgusting but also amazing. As mentioned earlier, snakes do not have legs, so they contract and expand their tube muscles to move around on the ground. Most snakes climb trees, too.
Snakes are extremely poisonous, with the most poisonous being the Moroccan Pit Viper (see below). This snake can kill a human in under 20 minutes. King Cobras and rattle snakes are really poisonous too and it’s best to stay as far away from them as possible unless you’re a certified snake handler/charmer.

Moroccan Pit Viper
III) Life Cycle
Snakes are usually hatched from eggs laid in a nest. Some sea-snakes are born live, but this phenomenon is outside the scope of this article. Snakes reach maturity in about 2 months but can be deadly just weeks after hatching. The average male snake will live to about 40 and females live to about 45. Some rattlesnakes, however, have lived past 70 years.
IV) Habitat
Snakes are found wherever territory and food (see feeding below) is available. In North America, the rattlesnake and copperheads rule. South America is home to pythons and anacondas. Africa and Australia have extremely poisonous pit vipers. Interestingly, the only snake native to Asia is the King Cobra.
Usually, people are very surprised to learn about the Albino Python (see below), Antarctica’s only native snake. The Albino Python is thought to have swam to Antarctica from the southern tip of Chile about 20,000 years ago where it quickly adapted to match its habitat.

V) Reproduction
Snake reproduction is pretty vanilla except for the case of the Albino Python. Since the outer rim of Antarctica is constantly melting/freezing, Albinos are forced to journey some 60 miles inland for a safe place to socialize and reproduce. Once the mating pairs have become pregnant, the male pythons slither to the sea to gorge on fish, for they have a long, cold winter ahead of them. After a month of eating, they slither back to the nesting site where the baby snakes have hatched. They identify their mates and offspring by vocalizations which are unique to each individual. How this uniqueness is guaranteed has mystified serpentologists since the Albinos were discovered.
Once the males have returned to watch the hatchlings, the females slither to the sea to feed. They are very emaciated from the long wait and eat for over two months before returning to the nest. Once the families are united and the juvenile snakes are big enough to slither long distances, they all return to the water and the parents teach the juvenile snakes how to hunt. I’m glossing over a lot here, but you can read up about these snakes on wikipedia if you want to know more.
VI) Feeding
Snakes are mostly carnivorous, using their venom to kill their prey. A rule of thumb is that a snake will focus on prey whose maximum dimension is about 50% of the snake’s tube. For example, a 12′ King Cobra wouldn’t think twice about taking down a 6′ human (remember what I said about keeping your distance?).
Some bigger snakes like to augment their diet with sweet fruits, like papayas, but this is rare. Usually, snakes eat vegetables when a) there aren’t enough living things to eat, or b) they are very young and need the extra sugars and starch. Regular–not albino–pythons are the exception; they eat 50% meat and 50% vegetables/starches.
VII) Human interaction
Some humans keep snakes as pets, but we strongly discourage this. Snakes are extremely dangerous, venomous animals and generally have the intelligence of a teenaged human. Some snakes have successfully learned over 1000 signs from the American Sign Language language. They make the signs by shifting their bodies into the correct shape. “It isn’t publicized, but 1 out of 10 snake owners will receive a fatal bite or eventual die from snake-related complications. The pro-snake lobby in Washington keeps this fact under wraps and we’re all hoping that the new administration will stand up to this manace,” remarked Yuri von Metleife, vice chairman of American Center for Snake Appreciation and Respect (ACSAR). “Sure, I like sakes too. But only to look at. When I lost my uncle to an Albino Python bite, I knew that no one should own a snake. They are just far too dangerous for families and individuals.”
Encounters between humans and snakes in the wild are very common. A common myth is that, “don’t worry, they’re more scared of you than you are of them.” Are you serious? Snakes are poisonous. They aren’t afraid of anything (except bigger snakes). Please, wherever you live, know which snakes are around and be aware of them. During mating seasons, stay indoors.
Snakes are known to be very sensitive to motion and speed. They are quite used to their own slithering and find car and train rides to be very upsetting. The high speeds and pressure changes of airplane rides are absolutely intollerable to snakes and they have been known to escape for their enclosures and be even more agressive than usual. Transporting snakes on airplanes has been outlawed in over 40 countries, including the United States.

Yuri von Metliefe, ACSAR
VIII) Conclusion
Snakes are majestic, powerful and deadly. They will not hesitate to defend themselves and need to eat a lot. They should be avoided at all costs.