Guanacos, the wild cousins of llamas, lived throughout Chile until about 500 years ago. Central Chile is a mediterranean climate biodiversity hotspot, with many endemic plant and animal species. This is a pilot project to rewild the "espinal" savannas of central Chile with guanacos. We expect guanacos to have positive ecological interactions with the main tree in espinal, the espino. Guanacos in espinal should restore this habitat, raise the profile of local biodiversity, and facilitate sustainable livestock production.