Also present is the Antarctic Petrel, Antarctic Shag, King Penguin, Macaroni Penguin, and Arctic Tern. The storm petrel, a relative of the petrel, is the smallest seabird. Inaccessible Island is also the only known breeding ground of the spectacled petrel. Prominent species include the endemic, endangered Phoenix petrel. Oeno's ornithological significance derives principally from its Murphy's petrel colony. Rechristening the plane "Stormy Petrel" and then "Excalibur III", Blair began setting records. The motif of the stormy petrel has a long association with revolutionary anarchism. He identified the bird as a Bermuda petrel. The snow petrel is one of only three birds that breed exclusively in Antarctica. The ship is named after the sea bird petrel. Several species of storm petrel are threatened by human activities. One species, the Guadalupe storm petrel, is thought to have gone extinct. However, they have been found to consume prey as large as the ashy storm petrel. A sailing superstition holds that the appearance of a storm petrel foretells bad weather. It is very difficult to accurately determine Storm Petrel populations.