In the first the breeding male Common Goldeneye is on the right and the breeding female is on the left. In the second photo the breeding male Common Goldeneye is on the left and the breeding female on the right.
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 Rep.-Columbia-Guatemala-St Kitts-Guadaloupe-Barbados-Grenada-Aruba-Bonaire-Iceland-United Kingdom-Netherlands-US Virgin Islands-Belize-Honduras