Another Hall County bridge, another federally protected winged creature. The barn swallow has emerged as the latest animal to force change in a Georgia Department of Transportation project — this time the widening of Ga. 347/Lanier Islands Parkway between McEver Road and Interstate 985 in South Hall. “The birds are nesting under the bridge over the railroad, almost at McEver Road,” meaning workers will have to wait until September to complete the bridge barrier and side walls, DOT district spokeswoman Teri Pope said.