If you think it's cold, spare a thought for Ralph the penguin. The 16-year-old Humbolt penguin at Marwell Zoo has been fitted with a winter wetsuit.

He malts much quicker than the other penguins so he doesn't have any feathers to keep him warm. He has been fitted with the wetsuit for the past seven years.

Aside from wearing a wetsuit, Ralph swims, eats and plays just like the other penguins. The rubber in the wetsuit, which is the same as a human's wetsuit, is extremely flexible and doesn't restrict his movement.

His partner Coral can often be seen grooming Ralph's wetsuit just as she would if he had feathers.