A discovery in the Big Bend State Park has drawn some recent attention. A Large Donkey fossil was found near the banks of the Rio Grande. Scientists are baffled at this find, due to the current theory that donkeys and burros are not native species. This may be due to the fact that when early settlers came to Old Mexico, no burros resided in the area. But before man arrived in the area, the existence of the species may have been possible. Don't tell that to a Ranger who is on the hunt for those 'pesky buwwows'.