Why do female and male swans replace feathers at different times?

Female and male swans replace feathers at different times primarily due to their differing roles in breeding and parental care. Females often molt after the breeding season to ensure they are fit for nesting and caring for cygnets, while males typically molt later, allowing them to remain vigilant and protect the family unit during the critical early stages of chick development. This staggered molting pattern helps optimize their reproductive success and ensures the survival of their offspring.