About Oceanodroma castro (Harcourt, 1851)
The band-rumped storm petrel (scientific name: Oceanodroma castro (Harcourt, 1851)) measures 19–21 cm (7.5–8.3 in) in length, has a 43–46 cm (17–18 in) wingspan, and weighs 44–49 g (1.6–1.7 oz). Its plumage is mainly brownish black, with a large white rump. It shares similarities with Leach's storm petrel, as both have a forked tail and long wings. However, Leach's storm petrel has a more deeply forked tail, a differently shaped white rump that is V-shaped or triangular, and a 'tern-like' flight, while the band-rumped storm petrel has a more 'shearwater-like' flight. This species breeds on islands in the warmer regions of the Atlantic and Pacific Oceans. In the Atlantic, its breeding locations include Berlengas (a few tens of kilometers off mainland Portugal), the Azores, Madeira, the Canary Islands, and Saint Helena. In the Pacific, it breeds off eastern Japan, on Kauai, Hawaii, and on the Galápagos Islands. In 2016, it was reported that this species had also begun breeding on the Mauna Loa volcano on the island of Hawaii.
