Band-rumped Storm-petrel
A species of Dark Storm Petrels Scientific name : Hydrobates castro Genus : Dark Storm Petrels
Band-rumped Storm-petrel, A species of Dark Storm Petrels
Botanical name: Hydrobates castro
Genus: Dark Storm Petrels
Content
Description General Info
Description
The band-rumped storm petrel, Madeiran storm petrel, or Harcourt's storm petrel (Oceanodroma castro) is of the storm petrel family Hydrobatidae. The band-rumped storm petrel is 19–21 cm in length with a 43–46 cm wingspan, and weighs 44–49 g. It is mainly brownish black with an extensive white rump. Similar to Leach's storm petrel with the forked tail, long wings, but Leach's has a more deeply forked tail, a differently shaped (V-shaped or triangular) white rump, and a 'tern-like' flight, whereas the band-rumped storm-petrel has a more 'shearwater-like' flight. The species breeds on islands in the warmer parts of the Atlantic and Pacific Oceans. These include the Berlengas (a few tens of kilometres off mainland Portugal), the Azores, Madeira, Canary Islands and Saint Helena in the Atlantic, and in the Pacific off eastern Japan, on Kauai, Hawaii, and on the Galápagos Islands. In 2018, the species was reported to have also started breeding on the Mauna Loa volcano on the island of Hawaii. Birds nest in colonies close to the sea in rock crevices and females lay a single white egg per breeding attempt. The band-rumped storm petrel spends the non-breeding period at sea. Individuals feed by picking up prey items (invertebrates, small vertebrates and sometimes carrion) from the water surface. A study aiming to determine the diving abilities of this species was actually conducted on the 'warm season' population from the Azores, which was later recognized as a distinct species (see below). The band-rumped storm petrel is strictly nocturnal at its breeding sites to avoid predation by gulls and diurnal raptors such as peregrines, and will even avoid coming to land on clear moonlit nights. Like most petrels, its walking ability is limited to a short shuffle from/to the burrow. Recent discoveries of 'cold season' and 'warm season' populations, which use the same nest sites at different times of year, and also differ in terms of vocalisations and moulting period, may hint at the existence of two 'cryptic species' within the currently understood limits of the species. After population genetics analyses of mtDNA, the warm season population in the Azores was recognized as a separate species, Monteiro's storm petrel.
Size
21 cm
Life Expectancy
36 years
Nest Placement
Cliff
Feeding Habits
Band-rumped Storm-petrel primarily feeds on fish and squid, foraging at night using its acute sense of smell to locate prey. This species exhibits unique dietary adaptations, including the ability to process high-energy foods, critical for sustaining its long-distance flights.
Habitat
Oceanic islands, pelagic, tropical oceans
Dite type
Piscivorous
General Info
Feeding Habits
Bird food type
Scientific Classification
Phylum
Chordates Class
Birds Order
Albatrosses and Petrels Family
Hydrobatidae Genus
Dark Storm Petrels Species
Band-rumped Storm-petrel