The horizon is actually very very slightly tilted, and I think that is subconsciously (or consciously) noticeable, and is something that detracts from the image, and should have been fixed before posting. Now, looking at this image nine years later, I also crop my images toatally differently.
Anguilla,Antigua and Barbuda,Bahamas,Barbados,Belize,Bermuda,Brazil,British Virgin Islands,Canada,Cayman Islands, Colombia,Costa Rica,Cuba,Dominica,Dominican Republic,Ecuador - Galapagos Islands,Ecuador - mainland,El Salvador,French Guiana,Greenland, Grenada,Guatemala,Guyana,Haiti,Honduras,Iceland,Jamaica,Kiribati,Mexico,Montserrat, Netherlands Antilles,Nicaragua,Panama,Peru,Pitcairn Islands,Puerto Rico,Saint Kitts and Nevis,Saint Vincent and the Grenadines,Suriname,Trinidad and Tobago, Turks and Caicos Islands,United States - Hawaii,United States - mainland,Venezuela,Virgin Islands,
IOC 9.1 Subspecies
coastal se Canada, e and s USA to e Central America, sw USA, w Mexico