I have photographed a few Least Terns (Sternula antillarum) in North Carolina and Florida.
Least Tern, Ft. De Soto, St. Petersburg, Florida, USA, June 29, 2012
Least Tern, Ft. De Soto, St. Petersburg, Florida, USA, June 29, 2012
Least Tern, Bear Island, Hammocks Beach State Park, North Carolina, USA, June 16, 2006