Preening Swan

  Swans are the ultimate preeners among birds and spend a good part of their day at it, all the year round. The preen gland at the base of the tail produces an oil for the swan to spread through it's feathers, waterproofing them and retaining heat, also moisturising the bill. The swan reaches for the base of a feather and nibbles all the way to the top, removing dirt and small parasites. This also aligns the barbs so they interlock and create a uniform, flexible surface that is important for insulation and flight. For preening around the head and face, the feet are used. I looked up these facts as I don't know much about the habits of wildlife, although I know many of my blip friends do.