More info: There are six different species of swans - the mute Swan, Tundra Swan, Black Swan, Trumpeter Swan, Black-Necked Swan, and the Whooper Swan.
Swans live in a variety of environments, including lakes, ponds, slow moving rivers and streams, wetlands and marshes.
Swans usually mate for life but will occasionally choose a different mate if their partner dies or they cannot produce offspring. When nesting, these birds usually choose sites in close proximity to water. They nest on islands, reed beds, and in dense vegetation close to the edge of the water. Females lay between four and seven eggs per clutch.
Depending on the species, incubation lasts anywhere from a month to a month and a half. The cygnets stay under the watchful eye of their parents until they are about a year old.