Adult glaucous gull (Larus hyperboreus) eating common eider duckling (Somateria mollissima) in Svalbard, Norway, Arctic, Europe

glaucous gull common eider duckling svalbard norway arctic wildlife predation bird conservation nature seabird hunting animal behavior ecosystem shore coastal avian predator prey feeding survival natural habitat water birdwatching dense population animal interaction marine tundra aquatic life behavior species natural selection food chain wildlife observation biodiversity fauna predator birds conservation status ornithology migratory patterns juvenile birds nesting feeding habits young birds avifauna wildlife study ecology animal survival arctic ecosystems native species