Giant Petrels, Macronectes giganteus, in flight over Drakes Passage. Largest of the petrel family, Giant petrels, unlike albatrosses, forage on both land and sea. On land, they kill birds as large as King penguins and scavenge in seal colonies. At sea, they eat fish, squid and crustaceans, scavenging dead whales and seabirds, as well. Their carrion-feeding reputation earned them the nickname 'stinkers' from whalers.