Puffins under threat across Europe
10 June 2015 Last updated at 13:08 BST
Its black and white body and brightly-coloured bill make the puffin one of Britain's best-loved birds.
But across Europe puffins have been classified as at risk of extinction because of climate change and a lack of food.
BBC reporter Paul Murphy sent Newsround this report from RSPB Bempton reserve on the cliffs of East Yorkshire in England.