Surprise! It’s the albatross. These birds take ages to reach sexual maturity and even longer to start breeding, allowing for plenty of time to practice their mating dance, which they learn by watching older birds court each other. Young albatrosses dance with several partners, testing out various pairings, but eventually choose just one partner to dance with forever. They literally have their own special dance that they only do with each other, and then they settle down into a little family for life. It seems that all this effort up front occurs because albatrosses have so few young, and take a long time to raise them. It’s a huge effort, so you want to be sure you pick the right bird. Sometimes they get bird-divorced, but only if they’ve tried to have chicks several years in a row and can’t seem to make it work. Also the young ones are so fluffy it hurts. Long live the albatross.