Bulwer's Petrel

Bulwersturmvogel ( Bulweria bulwerii )

The Bulwersturmvogel ( Bulweria bulwerii ) is a monotypic species of the family of the petrels. The species is a very rare Irrgast on the coasts of Europe. There are few evidence for the UK, Ireland, France, Italy, Spain and Portugal.

Description

When Bulwersturmvogel it is a very dark rußbraune, small and slim Sturmvogelart with long, narrow wings that carry due to lighter coverts oberseits a pale longitudinal binding. The lower wing surface is uniformly dark, the beak black. The feet are flesh-colored. The rather long tail is a species-typical trait. It is usually combined and then acts very narrow when it is fanned out, which is not often the case, he makes a wedge-shaped impression.

The Bulwersturmvogel reaches a height 26 to 28 inches and weighs 78-130 grams. The wingspan is 68 to 73 centimeters.

Voice

The type calls only at night at the hatchery. From there, a dull, hoarse barking and gereihtes hroo be heard, reminiscent of a steam locomotive.

Distribution and population

The Bulwersturmvogel is pantropical spread. Breeding areas in the Western Palearctic be found in the Azores, Madeira, Canary Islands and Cape Verde. In the Pacific, the species occurs from eastern China before to Hawaii and the Marquesas Islands. The European breeding population of this species is about 7000-9000 breeding pairs.

Way of life

Bulwersturmvögel are colony breeders. They build their nests in small cavities under boulders or rock walls. Slightly larger than the sepia - petrel is a Nistplatzkonkurrent so that the Bulwersturmvögel often need to resort to nesting areas with relatively small inputs.

At the hatchery to keep the birds from April to August. After the end of the breeding season there is Streuungswandungen in all oceans of the tropical and subtropical zones. The food of Bulwersturmvögel consists mainly of plankton and comb jellyfish.

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