Buenos Aires was a cattle ranch for 120 years before it became part of the National Wildlife Refuge System in 1985. Most of the maze of fences has been removed, but several miles remain. Barbed wire is an impediment to movement of deer and pronghorns, sometimes leading to death through entanglement. The volunteer efforts of these workers open up the landscape to benefit wildlife and also restores the pre-settlement panorama of sweeping vistas of rippling grass.