Northern giant petrel (Macronectes halli) threat display while feeding on elephant seal pup carcass at Stromness, South Georgia, Polar Regions

macronectes halli threat display feeding behavior carcass stromness south georgia polar regions wildlife scavenging marine birds seabird behavior natural feeding antarctic ecosystem coastal habitat ocean animal interaction avian threat predator competition ecological dynamics wildlife observation nature animal behavior marine environment seal carcass biodiversity conservation feeding frenzy kelp gull offshore avian species antarctic wildlife feeding ecology scavengers environmental science ornithology arctic fauna marine ecosystem oceanic birds birdwatching polar wildlife natural habitats seabirds animal competition adaptations bird behavior ecological interactions south atlantic