Can be seen from Late March until late October. They will return year after year to the same praire dog colony. True to its name, the Burrowing Owl nests in a hole in the ground. Although it is quite willing to dig its own burrow, it often uses one already provided by prairie dogs, skunks, armadillos, or tortoises. It is a state endangered species in Colorado. Information provided by May Jo Stark with the Aurora Parks, Recreation and Open Space.