The Enigma puzzling Colorado and Nebraska law enforcement in more than a dozen counties, witnesses say the drones typically appear after sunset as many as 30 flying information 200 to 300 feet above ground, some with wing spends estimated at six feet one share of pinpointing the area where a rancher spotted some a New Year's Eve, he observed anywhere from 5 to 10 drones over about 25 miles square radius. 68