Residents in Marathon are being warned to unscrew their porch lights after a strange visitor has been spotted. Large moths as big as 12 inches have been swarming the area for several days. The 'Fur Gigantis' moth travels very high in the jet stream from South America to the Canadian border area every spring. La Nina has been blamed for high wind down drafts that have caused these huge furry insects to invade.They have created quite the traffic hazard in Downtown Marathon. On the lighter side, Larry Bondsville, owner of a local car wash seems pleased at the arrival of these visitors. " They could stay here all spring for all I care. I don't even have porch lights.."