However in captivity a swan may live to be 20-30 years old. Swans mate for live, and can begin developing socially monogamous pair bonds at only 20 months old. Mates can often be seen “displaying” during mating season, gracefully touching chest to chest and bill to bill until a heart shape is formed, or gently intertwining necks. However, if there has been a nesting failure or a mate dies, “divorce” has been known to happen between the pair with the surviving swan finding a new mate. Nesting season usually starts in late March and usually lasts until the cygnets can launch out on their own. Swans are usually not aggressive, except when protecting mates, babies, and territory. In the cases of protecting territory, a swan will attempt to drown the challenger. During nesting season, a nest of approximately a meter in length is made and 5-10 eggs are laid, which usually takes 35-42 days to hatch. Females usually incubate the eggs, but male swans will occasionally help construct the nest and incubate the eggs. After the eggs hatch, baby swans have fluffy pale grey feathers with grey legs and feet that will turn black as they grow, along with gaining their beautiful white plumage (A-Z
However in captivity a swan may live to be 20-30 years old. Swans mate for live, and can begin developing socially monogamous pair bonds at only 20 months old. Mates can often be seen “displaying” during mating season, gracefully touching chest to chest and bill to bill until a heart shape is formed, or gently intertwining necks. However, if there has been a nesting failure or a mate dies, “divorce” has been known to happen between the pair with the surviving swan finding a new mate. Nesting season usually starts in late March and usually lasts until the cygnets can launch out on their own. Swans are usually not aggressive, except when protecting mates, babies, and territory. In the cases of protecting territory, a swan will attempt to drown the challenger. During nesting season, a nest of approximately a meter in length is made and 5-10 eggs are laid, which usually takes 35-42 days to hatch. Females usually incubate the eggs, but male swans will occasionally help construct the nest and incubate the eggs. After the eggs hatch, baby swans have fluffy pale grey feathers with grey legs and feet that will turn black as they grow, along with gaining their beautiful white plumage (A-Z