As the Bureau of Land Management (BLM) prepares to launch a massive burro roundup next week in the lower Sonora Desert, where temperatures are expected to exceed 100 degrees, the American Wild Horse Preservation Campaign (AWHPC), a coalition of more than 50 organizations, is calling on the BLM to postpone the helicopter stampede and capture operation until Fall, when temperatures will be lower. In a letter to the BLM, the AWHPC cited the opinions of leading scientists and humane experts, who stated definitively that wild burros and wild horses should not be rounded up by helicopters in temperatures above 90 degrees.