Bulwer petrel
| Bulwer petrel | ||||||||||
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Bulwer Petrel ( Bulweria bulwerii ) |
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| Bulweria bulwerii | ||||||||||
| ( Jardine & Selby , 1828) |
The Bulwer's Petrel ( Bulweria bulwerii ) is a monotypic species of the family of the petrels . The species is a very rare stray visitor to the coasts of Europe. There is a small amount of evidence for the UK, Ireland, France, Italy, Spain and Portugal.
description
The Bulwer petrel is a very dark, soot-brown, small and slender species of petrel with long, narrow wings that have a pale length band on top due to the lighter arm covers. The underside of the wing is monochrome and dark, the beak black. The feet are flesh-colored. The rather long tail is a characteristic of the species. It is usually folded and then looks very narrow when it is fanned out, which is rarely the case, it makes a wedge-shaped impression.
The Bulwer petrel reaches a body size between 26 and 28 centimeters and weighs between 78 and 130 grams. The wingspan is 68 to 73 centimeters.
voice
The species only calls at the breeding site at night. From there, a dull, hoarse barking and lined up hroo can be heard, reminiscent of a steam locomotive.
Distribution and existence
The Bulwer petrel is pantropical . Breeding areas in the Western Palearctic are found in the Azores, Madeira, Canaries and Cape Verde. In the Pacific, the species occurs from eastern China to Hawaii and the Marquesa Islands. The European breeding population of this species is about 7,000 to 9,000 breeding pairs.
Way of life
Bulwer petrels are colony breeders. They build their nests in small caves under boulders or rock walls. The slightly larger sepia petrel is a nesting site competitor, so that the bulwer petrels often have to move to breeding sites with relatively small entrances.
The birds stay at the breeding site from April to August. After the end of the breeding season, scattering walls occur in all oceans in the tropical and subtropical zones. The diet of the Bulwer petrels consists mainly of plankton and comb jellyfish.
supporting documents
literature
- Hans-Günther Bauer, Einhard Bezzel and Wolfgang Fiedler (eds.): The compendium of birds in Central Europe: Everything about biology, endangerment and protection. Volume 1: Nonpasseriformes - non-sparrow birds. Aula-Verlag Wiebelsheim, Wiesbaden 2005, ISBN 3-89104-647-2 .
- GS Tuck, H. Heinzel: The sea birds of the world , Paul Parey publishing house, Hamburg / Berlin 1980, ISBN 3-490-07818-7
- L. Svensson, PJ Grant, K. Mularney, D. Zetterström: Der neue Kosmos-Vogelführer , Franckh-Kosmos Verlags-GmbH, Stuttgart 1999, ISBN 3-440-07720-9
Single receipts
Web links
- Videos, photos and sound recordings about Bulweria bulwerii in the Internet Bird Collection
- Bulweria bulwerii in the endangered Red List species the IUCN 2009. Posted by: BirdLife International, 2009. Accessed July 26 of 2010.