Adult, Alcidae, Alternate Plumage, Animal, Atlantic Puffin, Bill-gaping, Bird, Breeding Plumage, Britain, Color Photograph, Common Puffin, Day, Defensive Posture, Displaying, Europe, Flower, Fratercula arctica, Fratercula arctica grabae, Fratercula sp, Front View, Great Britain, Head and Shoulders, Horizontal, Island, Least Concern, National Nature Reserve, National Reserve, Nobody, Nuptial Plumage, One Animal, Open Mouth, Outdoors, Pembrokeshire, Puffin, Seabird, Skomer Island, Skomer Island National Nature Reserve, Threat Display, UK, United Kingdom, Wales, Wildlife