With 46 different ecosystems, Ecuador is one of the 17 most biodiverse countries in the world. Ecuador is one of the best naturally preserved countries in the world, and its geographic and latitudinal positioning as well as its climate and terrain make it the country with the most animal species of the region, and one of the 10 countries with the highest endemism worldwide. Ecuador has 10% of all of the species of plants on the planet. Of this percentage, a great quantity grows on the range of the Andes mountains in the northwest region, where it is calculated that there are 10,000 species. In the Amazons region there is also a large amount of vegetative species, around 8,200, and 4,300 orchid species have been identified in the country. In Galapagos, on the other hand, there are around 600 native plant species and another 250 introduced by man. Of the dozen key biodiversity zones identified by the naturalist Norman Myers, three have been found in the Ecuador continental. The climatic diversity has resulted in more than 25,000 species of trees. Ecuador offers many opportunities to observe all of its biodiversity, in its 51 protected areas.