Simplify the following text for a Grade 10 native English-speaking person.
Original: The Andes is rich in fauna : With almost 1,000 species , of which roughly 2\/3 are endemic to the region , the Andes is the most important region in the world for amphibians .
Simplified: With almost 1,000 species , of which about 2\/3 are endemic to the region , the Andes is the most important region in the world for amphibians .