Each day I visit my local park. There are a pair of Mute Swans, who may be quite young, 2/3 years old. The pen finished laying 8 eggs around 24th April, and has been sat on the eggs ever since, assisted by her partner. We were expecting them to hatch around 16th March. However, there has been no sign of cygnets, and she and her partner are still sitting on the nest with no sign of abandoning it.
Is there still a chance they will hatch?