Yes, usually swans mate for life. Swans live in pairs. Each pair occupies a certain area and protects it from the invasion of neighbors and other birds, but where the swans nest massively the boundaries of their sites are erased, in this case birds may have their nests not far from each other and neighbors are more tolerant.
The character of the swans is calm and noisy. Usually these birds swim slowly without giving a vote. Screaming swans rarely, but their voice is very sonorous. This is reflected in the names of some species (swan-swan, swan-trumpeter). But the most famous form – the swan-mute swan – is almost speechless, these swans can not cry, they only hiss in case of threat.
Swans are not timid birds, in case of danger they try to scare off the enemy by stretching their necks, flapping their wings and biting their beaks. Do not underestimate such “peaceful” ways of fighting – the swan is a large and strong bird and the impact of the wing is able to break the hand of a teenager.
The breeding season occurs in northern species early – 1-2 weeks after arrival at the nesting sites (in March-April), the reproduction of tropical species is timed to the rainy season. Swans do not have marital fights, but they protect their territory and their favorite friend zealously: if the swan sees a potential rival, he swims to him and slams his wings 10 to 20 meters loudly.
The very current is peaceful – the swans swim with slightly raised wings, make a nod of the head.