2.2. Mexicans have found the species in Xochimilco
2.3. The axolotl has been studied since the 17th century
2.4. Also known as the Mexican walking fish, is a neotenic salamander related to the tiger salamander.
2.5. He has capacity for regeneration to heart and brain, and the size is around 15 cm
3. Bibliography
3.1. https://www.iucn.org/e (UICN, Unión Internacional para la Conservación de la Naturaleza) https://www.britannica.com/animal/amphibian/Evolution-and-classification (Britannica) https://www.nationalgeographic.es/animales/axolote-mexicano (Nat Geo)
4. Evolution
4.1. He has evolved during the Devonian period from sarcopterygian fish
4.2. He has changed lungs and bony-limbed fins features.
4.3. He has did helpful in adapting to dry land.
4.4. He has been tag with amphibious
5. Danger of extinction
5.1. They have been listed as critically endangered in the wild, with a decreasing population, by the International Union for Conservation of Nature and Natural Resources
5.2. Lake´s Xochimilco
5.3. They have not adapted for trash and died a lot of
