--- title: Snakes to keep away from: cobras, mambas, vipers and rattlesnakes — a lesson of Mova's school · trees and pragmatics description: «Snakes to keep away from: cobras, mambas, vipers and rattlesnakes», a lesson of the biology course of Mova's primary school, sentence by sentence with dependency trees and pragmatics. It begins: Some snakes have venom, a poison made in glands in the head and pushed into a bite through hollow or gro --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/biology/322-snakes-to-keep-away-from-cobras-mambas-vipers-and-rattlesnakes/) [home](https://md.mova.elamur.ai/free/en/) / [corpora](https://md.mova.elamur.ai/free/en/corpora/) / [school](https://md.mova.elamur.ai/free/en/corpora/school/) / [Biology](https://md.mova.elamur.ai/free/en/corpora/school/biology/) / Snakes to keep away from: cobras, mamb… # Snakes to keep away from: cobras, mambas, vipers and rattlesnakes Lesson 322 of the biology course of Mova's primary school: 21 sentences, each with its syntax tree and pragmatics. The lessons are written for Mova, and their agreed trees are part of Mova corpus 0.4 (CC BY-SA 4.0). How Mova does on its tests: [the lesson at school](https://md.mova.elamur.ai/free/en/school-run/biology/322-snakes-to-keep-away-from-cobras-mambas-vipers-and-rattlesnakes/). - [0](https://md.mova.elamur.ai/free/en/corpora/school/biology/322-snakes-to-keep-away-from-cobras-mambas-vipers-and-rattlesnakes/0/) — Some snakes have venom, a poison made in glands in the head and pushed into a bite through hollow or grooved teeth called fangs. - [1](https://md.mova.elamur.ai/free/en/corpora/school/biology/322-snakes-to-keep-away-from-cobras-mambas-vipers-and-rattlesnakes/1/) — Cobras, mambas, vipers and rattlesnakes are the famous ones. - [2](https://md.mova.elamur.ai/free/en/corpora/school/biology/322-snakes-to-keep-away-from-cobras-mambas-vipers-and-rattlesnakes/2/) — Most venomous snakes would much rather warn you than bite you. - [3](https://md.mova.elamur.ai/free/en/corpora/school/biology/322-snakes-to-keep-away-from-cobras-mambas-vipers-and-rattlesnakes/3/) — A cobra spreads its hood, a rattlesnake buzzes its rattle and a black mamba opens its inky black mouth, all saying «I am dangerous, go away». - [4](https://md.mova.elamur.ai/free/en/corpora/school/biology/322-snakes-to-keep-away-from-cobras-mambas-vipers-and-rattlesnakes/4/) — Films get snakes wrong all the time. - [5](https://md.mova.elamur.ai/free/en/corpora/school/biology/322-snakes-to-keep-away-from-cobras-mambas-vipers-and-rattlesnakes/5/) — Snake charmers' cobras do not dance to music, mambas do not chase horses, and sucking out venom does not help a bitten friend. - [6](https://md.mova.elamur.ai/free/en/corpora/school/biology/322-snakes-to-keep-away-from-cobras-mambas-vipers-and-rattlesnakes/6/) — Picture a walker on a heath who sees an adder sunbathing on the path: the best plan is simply to stop, step back and go round it. - [7](https://md.mova.elamur.ai/free/en/corpora/school/biology/322-snakes-to-keep-away-from-cobras-mambas-vipers-and-rattlesnakes/7/) — Snakes bite people mostly when they are trodden on, grabbed or cornered. - [8](https://md.mova.elamur.ai/free/en/corpora/school/biology/322-snakes-to-keep-away-from-cobras-mambas-vipers-and-rattlesnakes/8/) — Of about 4,000 kinds of snake, only about 200 are really dangerous to people, and many snakes help farmers by eating rats. - [9](https://md.mova.elamur.ai/free/en/corpora/school/biology/322-snakes-to-keep-away-from-cobras-mambas-vipers-and-rattlesnakes/9/) — A cobra lifts the front of its body and spreads long ribs in its neck to stretch the skin into a hood, a warning that says «I am big, leave me alone». - [10](https://md.mova.elamur.ai/free/en/corpora/school/biology/322-snakes-to-keep-away-from-cobras-mambas-vipers-and-rattlesnakes/10/) — The king cobra is the longest venomous snake, growing to about 5 metres; it eats mostly other snakes, and its science name Ophiophagus means «snake-eater». - [11](https://md.mova.elamur.ai/free/en/corpora/school/biology/322-snakes-to-keep-away-from-cobras-mambas-vipers-and-rattlesnakes/11/) — A mother king cobra builds a nest of leaves for her eggs, which almost no other snake does. - [12](https://md.mova.elamur.ai/free/en/corpora/school/biology/322-snakes-to-keep-away-from-cobras-mambas-vipers-and-rattlesnakes/12/) — Vipers have two long hollow fangs at the front that fold back against the roof of the mouth when it closes, and spare fangs wait behind them in case one breaks. - [13](https://md.mova.elamur.ai/free/en/corpora/school/biology/322-snakes-to-keep-away-from-cobras-mambas-vipers-and-rattlesnakes/13/) — A rattlesnake's rattle is a stack of loose hollow rings made of the same stuff as your fingernails, and it adds a ring each time it sheds, several times a year, so you cannot count the rings to tell its age. - [14](https://md.mova.elamur.ai/free/en/corpora/school/biology/322-snakes-to-keep-away-from-cobras-mambas-vipers-and-rattlesnakes/14/) — Black mambas are grey or olive-brown; the name comes from the inky black inside of the mouth, and their top speed is reported at only about 15 to 20 kilometres an hour. - [15](https://md.mova.elamur.ai/free/en/corpora/school/biology/322-snakes-to-keep-away-from-cobras-mambas-vipers-and-rattlesnakes/15/) — Some cobras can squirt venom from their fangs towards the eyes of an animal that threatens them; venom in the eyes must be washed out with lots of water and a doctor seen at once. - [16](https://md.mova.elamur.ai/free/en/corpora/school/biology/322-snakes-to-keep-away-from-cobras-mambas-vipers-and-rattlesnakes/16/) — The adder, with a dark zigzag down its back, is Britain's only venomous snake and also lives in Ukraine; it is shy, and deaths from adder bites in Britain are very rare. - [17](https://md.mova.elamur.ai/free/en/corpora/school/biology/322-snakes-to-keep-away-from-cobras-mambas-vipers-and-rattlesnakes/17/) — If someone is bitten, sucking, cutting, ice and tight bands do not help; keep the person calm and still, take off rings and watches, and get help at once, because hospitals have antivenom. - [18](https://md.mova.elamur.ai/free/en/corpora/school/biology/322-snakes-to-keep-away-from-cobras-mambas-vipers-and-rattlesnakes/18/) — Cobras hear sounds in the air poorly; a charmer's cobra follows the swaying pipe as if it were a threat, and India banned snake charming in 1972. - [19](https://md.mova.elamur.ai/free/en/corpora/school/biology/322-snakes-to-keep-away-from-cobras-mambas-vipers-and-rattlesnakes/19/) — Of about 4,000 kinds of snake, roughly 600 are venomous and only about 200 are really dangerous to people. - [20](https://md.mova.elamur.ai/free/en/corpora/school/biology/322-snakes-to-keep-away-from-cobras-mambas-vipers-and-rattlesnakes/20/) — Most snakes hunt rats, mice, frogs or insects and keep away from people, and snakes help farmers by eating rats that spoil grain. - ← previous: [Big snakes: pythons, boas and anacondas, and how big they really get](https://md.mova.elamur.ai/free/en/corpora/school/biology/321-big-snakes-pythons-boas-and-anacondas-and-how-big-they-really-get/) - next →: [Eagles: golden eagles, harpy eagles, Steller's sea eagles and eagle eyes](https://md.mova.elamur.ai/free/en/corpora/school/biology/323-eagles-golden-eagles-harpy-eagles-stellers-sea-eagles-and-eagle-eyes/) - ↑ back to [Biology](https://md.mova.elamur.ai/free/en/corpora/school/biology/)