Monday, July 30, 2007

Bulwer’s petrel fact sheet

Bulweria bulwerii | Bulwer's petrel

The bulwer’s petrel nests in the Azores, Madeira, Canary Islands and Cape Verde. It is listed as Endangered in the Azores, with only about 50 couples nesting only in Santa Maria, on the islet of Vila (although several birds have been caught in Graciosa Island). In the past this species was subjected to intense human pressure through hunting, destruction of their nesting habitats and predation by exotic mammals (especially cats, and rats). It is a highly pelagic bird, coming to land only during breeding season which is usually from May to October. When in flight Bulwer’s petrels are silent, but when they are at their nesting sites they emit a very characteristic sound known as a "woof“. On the breeding grounds their behaviour is nocturnal and colonial. The young fledge mid-September to October. This species is classified as "uncommon breeding" in the Azores.

Length: 26 - 28 cm

Weight: 87 - 98 cm

Wingspan: 68 - 73 cm

Population: 
• Europe: 7,500 - 10,500 reproductive pairs
• Azores: c.50 pairs

Longevity: 22.9 years

Diet: Small fishes and crustaceans (overnight)

Eggs: 1 (white)

Nesting period: Between April and September

Incubation: 45 days

Nesting sites: Rocky cavities, coastal caves or under low vegetation

Fledging: c.62 days

In other languages:
Portuguese: Alma negra
Spanish: Petrel de Bulwer
French: Pétrel de Bulwer
Italian: Uccello delle tempeste di Bulwer
German: Bulwersturmvogel
Dutch: Bulwers stormvogel
Swedish: Spetsstjärtad petrell
Norwegian: Spisshalepetrell 
Danish: -
Finnish: Tyrskyliitäjä



3 comments:

Joël Bried said...

Bom dia,

Acabei de ler o texto sobre a alma-negra e tenho algumas correcções para sugerir.
A mais importante é que as crias desta espécie não saem do ninho ente o final de Agosto e Setembro; saem do ninho a partir da segunda metade de Setembro até o início de Outubro no que concerne as crias mais tardias. "Bulwer's petrel" leva maíuscula à Bulwer. Além disso não é "the bulwer's petrel" mas "Bulwer's petrel" uma vez que Bulwer é o nome de uma pessoa.

Cumprimentos,
Joël Bried
(ex-investigador no Grupo das Aves Marinhas do DOP na Horta)

Anonymous said...

Given that I have worked on this species in the Azores, I suggest corrections to the text/por ter trbalhado com esta espécie nos Açores, sugiro correcções no texto:

Bulwer’s petrel nests in the Azores, Madeira, Canary Islands and Cape Verde. It is listed as Endangered in the Azores, with only about 50 couples nesting only on Santa Maria, on Vila islet (however, several birds have been captured on Graciosa Island). In the past this species faced intense human pressure through hunting, destruction of its nesting habitats and predation by exotic mammals (especially cats and rats). It is a highly pelagic bird, coming to land only during the breeding season which usually lasts from May to early October. When in flight Bulwer’s petrels are silent, but when they are in their nests they emit a very characteristic call known as a "woof“. On the breeding grounds their behaviour is nocturnal and colonial. The young fledge between mid-September and early October. This species is classified as "uncommon breeder" in the Azores.

Joël Bried

Anonymous said...

Thank you, we will make changes :)
Of course Bulwer should be with a capital letter.

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