Spring Burning Thanks in part to a great turn out by volunteers, the GLSD has been able to complete prescribed burns on several Conservancy properties. Spring burning of these natural areas is critical to promoting native vegetation while helping to limit and sometimes kill new buckthorn growth. It is a low cost but very effective strategy in controlling buckthorn seedlings. Burns have been completed at Winnebago Trail Conservancy, Sunnyside Conservancy, Norwegian Bay Wetlands, and the Tuleta ...