Relative location of collection sites in Florida and Georgia, USA, depicted by blue markers; the Delaware Bay spring migratory stopover site is designated with a red marker (1). States and water body names are included for orientation. Southeastern locations, by county (Co.) include: (2) Chatham Co., GA; (3) Glynn Co., GA; (4) Nassau Co., FL; (5) Duval Co., FL; (6) St. John’s Co., FL; (7) Palm Beach Co., FL; (8) Pinellas Co., FL; (9) Hillsborough Co., FL; and (10) Longboat Keys, FL. The map of the contiguous United States and the adapted inset were used under CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3).