How often do swans bread?

Swans typically breed once a year during the spring and early summer months. They establish monogamous pairs and build nests near water sources, where the female usually lays between 3 to 8 eggs. The incubation period lasts about 35 days, after which the cygnets hatch and are cared for by both parents. Depending on environmental conditions and their health, swans may breed every year or skip a year.