The Princess of Wales has marked her 44th birthday with a personal video on social media about the healing power of nature and the seasons.

"Even in the coldest, darkest season, winter has a way of bringing us stillness, patience and quiet consideration," said Catherine.

This is the concluding video in a four-part series, which has seen Catherine reflecting on the importance of nature to her, at a time when she has been recovering after cancer treatment.

"To be at one with nature, a quiet teacher and a soft voice that guides... Helping us to heal," she says, appearing wrapped up in a coat and hat in the winter scenes.

The video series, which began in the spring, has carried Catherine's personal and poetic thoughts on the positive impact of the natural world, over images of the changing seasons.