Life list: When I first observed these birds worldwide

These are only birds I've seen or heard myself, sorted from newest to oldest observations. A total of 568 species is included.
There are about 11,000 species of birds in the world, so this is just the start! By country first seen that's: Switzerland 174, Mexico 69, United States of America 60, Costa Rica 39, Spain 34, Laos 31, Cambodia 22, Botswana 21, Patagonia 20, Australia 16, Thailand 14, Panama 13, Iceland 12, South Africa 9, Namibia 5, Central America 4, Great Britain 4, Guatemala 4, Italy 4, Morocco 4, Belize 2, France 2, Portugal 2.