Nonbreeding Royal Terns have a white forehead and black crown, while in breeding Royal Terns, both the crown and forehead are black. In these Royal Terns the foreheads are partially black as they are molting from nonbreeding to breeding plumage.
U.S.-Canada-Costa Rica-Panama-Australia-New Zealand-Fiji-S Africa-Zambia-Zimbabwe-Botswana-Trinidad & Tobago-Mexico-Bahamas-Jamaica-Cayman Islands-Portugal-Italy-Greece-Turkey-Dominican Republic-Columbia-Guatemala-St Kitts-Guadaloupe-Barbados-Grenada-Aruba-Bonaire-Iceland-United Kingdom-Netherlands-US Virgin Islands
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