Hummingbirds are on the move, and soon, these fast-feathered birds will be fluttering through gardens all across the eastern and central United States. After wintering in Central and South America, ruby-throated hummingbirds begin their migration to the United States, arriving along the Gulf Coast in early March, according to Mississippi State University Extension Service. They gradually spread across dozens of states east of the Rocky Mountains throughout the spring. Advertisement By early