LAKELAND, Fla. – A Florida city shut down a section of a lake Thursday after receiving reports of swarming snakes. The Lakeland Parks & Recreation department wrote on its Facebook page that a group of non-venomous water snakes congregated to mate near a traffic roundabout. Officials said the snakes are “generally not aggressive as long as people do not disturb them.”Once mating is over, the snakes are expected to go their separate ways. The city said that Florida water snakes are a native species. Lakeland is in Central Florida, between Tampa and Orlando.