Gopherus flavomarginatus, commonly known as the yellow-margined tortoise, is a species of tortoise native to the arid regions of Mexico. It is characterized by its distinctive yellow margins on the shell, which can vary in color from brown to black. This tortoise typically inhabits grasslands and scrublands, where it digs burrows to escape the heat and find shelter. The yellow-margined tortoise is herbivorous, primarily feeding on grasses, leaves, and flowers. It plays a crucial role in its ecosystem by helping to aerate the soil through its burrowing activities. Conservation efforts are important for this species, as habitat loss and illegal trade pose significant threats to its survival.