Swans
As we all know, Swans are perhaps the most beautiful birds existing, we often describe them as gracious and proud creatures. And those attributes can most definitely be used to describe their mating process as well. Like every other species on this list, Swans form long lasting relationships with the opposite sex and spend a lot of effort nurturing the mutual bond. During the breeding season their mating process can last up to an hour unlike other bird species where mating takes place in a matter of seconds, and they do it over and over again, far more than it is necessary to fertilize the eggs, in this way they form a powerful bond with each other.
2 / 12
