Georgia  residents may not expect to find a four-foot-long reptile native to South America in their backyards. But wildlife officials are now warning residents to be on the lookout for an invasive species that threatens native wildlife, spreads disease and disrupts habitats across the region. The Argentine black and white tegu , a large lizard that can grow up to four feet long and weigh more than 10 pounds, has been found in Toombs and Tattnall counties in southeast Georgia. The Georgia