Adult Atlantic puffin (Fratercula arctica) during breeding season on tiny Grimsey Island, Iceland

atlantic puffin fratercula arctica breeding season grimsey island iceland seabird nature wildlife colorful beak rocky outcrop adult behavior marine life avian ecosystem conservation nesting shore icelandic landscape coastal habitat ornithology birdwatching migration summer parent chick feeding cliffs grass rocks natural environment lowland animal fauna avifauna puffins efforts ecology biodiversity sites