Northern giant petrels (Macronectes halli) fighting over the scavenging rights to a dead fur seal pup at St. Andrews Bay, South Georgia

macronectes halli scavenging south georgia coastal waters wildlife confrontation seabirds feeding behavior marine life animal interaction competition nature ecology avian fur seal birds scavengers habitat shore predator prey biodiversity colony antarctic seabird environment natural frenzy rights observation tussle coastline ecosystem foraging petrel fight dynamics atlantic ecological wild open water environmental