Land Purchase for the Vulnerable Bolson Tortoise in Mexico

Consisting of sweeping plains separated by low mountain ranges in northern Mexico, the Bolsón de Mapimí is a unique remnant of the Chihuahuan Desert grassland ecosystem and home to the Bolson Tortoise.

This imperiled tortoise was discovered only as recently as 1959; legend has it that a group of biologists working in the Bolsón de Mapimí were at a ranch and saw chickens eating out of a large tortoise shell. They inquired about the origin of the shell and local community members explained that it was “la tortuga grande del desierto,” the big turtle of the desert. The Bolson Tortoise is the largest tortoise species in North America and can grow to be around 18 inches in length.

At-risk for becoming overexploited as a food source, Mapimi Biosphere Reserve within Bolson de Mapimí was established to protect the endemic Bolson Tortoise. This area was also among the first biosphere reserves designated by the United Nations Educational, Scientific and Cultural Organization (UNESCO) in Latin America. While the Bolson Tortoise population within the limits of the reserve is recovering since its drastic exploitation in the mid-20th century, it is still threatened throughout the rest of its range.

One of these areas is Rancho San Ignacio, a privately-owned ranch within the reserve consisting of 43,243 acres – an area nearly three times the size of Manhattan. Its flat desert floor is punctuated by a series of small mountains and hosts a healthy Bolson Tortoise population of possibly hundreds. Through the purchase of this ranch property, Rainforest Trust and partners Habio, A.C. and the Turtle Conservancy are working to establish Mexican Bolson Tortoise Preserve to formally protect the preserve’s namesake species.