Madeira wave runner
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Madeira wave runner ( Oceanodroma castro ) |
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| Oceanodroma castro | ||||||||||
| ( Harcourt , 1851) |
The Madeira wave runner ( Oceanodroma castro ) is a monotypical species from the northern petrel family . It occurs in the eastern North Atlantic as well as in the eastern and western North Pacific .
description
The Madeira wave runner is 19–21 cm long and is shorter than the very similar wave runner . Because of the similarity with this species, it is very difficult to determine. Except for the white, square rump spot and a few feathers on the flanks and under tail-coverts, it is very dark. The upper side is soot black, the underside rather soot brown, the wing covers are a little lighter. This band on the arm wing, however, is more diffuse than on the wave runner. The weak crotch of the tail can hardly be seen at sea. The flight is straighter and faster than with other, similar species, the wing beats are weaker.
The Madeira wave runner weighs between 29 and 56 grams. The wingspan is between 44 and 46 centimeters.
voice
The species calls at night in its breeding caves, from which a cooing kr-rrrr or a high- pitched tji-wih can be heard, which sounds like the squeak of a finger on a glass plate.
Distribution and existence
The breeding areas of this petrel species are the islands of the eastern North Atlantic from the Azores and Madeira to Ascension and St. Helena . The species also breeds in the Pacific east of Japan, on the Hawaiian island of Kauai and on the Galapagos Islands . The largest European breeding stocks are in the Azores and Madeira. In 1997, between 900 and 1,250 breeding pairs were breeding in the Azores and between 2,000 and 2,500 breeding pairs in Madeira in 1994.
In Europe, the species is a rare exception with few records in Great Britain, Ireland, France and Spain, among others. In Central Europe, the species has only been observed once in December 1999, after an individual of this species was drifted into Switzerland by a storm.
Way of life
The habitat of the Madeira wave runner are warm, deep sea areas all year round. It breeds on small, uninhabited islands. The colonies are often located near breeding colonies of the white-faced petrel . The food mainly consists of crustaceans and fish, which are ingested from the surface of the water.
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 Oceanodroma castro in the Internet Bird Collection
- Hydrobates castro in the endangered Red List species the IUCN 2009. Posted by: BirdLife International, 2009. Accessed July 26 of 2010.