Species of bird
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The Barolo shearwater (Puffinus baroli), also known as the North Atlantic little shearwater or Macaronesian shearwater, is a small shearwater which breeds in the Azores and Canaries of Macaronesia in the North Atlantic Ocean. The English name and the specific "baroli" refers to Carlo Tencredi Falletti, marquis of Barolo.
Taxonomy.
Barolo shearwater was formally described in 1857 by the French naturalist Charles Lucien Bonaparte under the binomial name "Procellaria baroli". The specific epithet commemorates Carlo Tencredi Falletti, marquis of Barolo. This shearwater is now placed in the genus "Puffinus" that was introduced by the French zoologist Mathurin Jacques Brisson in 1760 with the Manx shearwater ("Puffinus puffinus") as the type species. The species in monotypic: no subspecies are recognised.
It was previously considered conspecific with the little shearwater ("Puffinus assimilis") of the southern hemisphere. Mitochondrial DNA cytochrome "b" sequence analysis indicated that "baroli" and "boydi" were very close to the nominate subspecies of Audubon's shearwater. BirdLife International retain the forms "baroli" and "boydi" within little shearwater. The British Ornithologists' Union accepted "P. baroli" as a distinct species in 2005, as has "Clements Checklist". The American Ornithologists' Union followed in 2013.
Description.
Features that distinguish the Barolo shearwater from the Manx shearwater and other North Atlantic "Puffinus" species include the pale face, silvery panel in the upperwings, shorter more rounded wings, and blue feet. As well as the pale face with the darkly contrasting eye.
Distribution.
The Barolo shearwater breeds on the Azores, Desertas, Savage and Canary Islands. The largest colony, of 1400 pairs, occurs on the Selvagen Islands. The non-breeding range is the tropical and sub-tropic northeast Atlantic.
Behaviour.
The Barolo shearwater feeds in the upper 15m of the water column, which is similar to the closely related Audubon's shearwater "Puffinus lherminieri" of the western Atlantic and Caribbean Sea. Barolo shearwaters do not have a preferred time of day to forage or rest and they may hunt for food during either day or night, although they seem to be more ready to fly in the daylight hours. They feed mainly on fish and cephalopods, with "Argonauta argo" being the most common cephalopod taken in the Azores but also being part of a diverse selection of cephalopod prey, while the fish taken were almost exclusively "Phycis spp".
Threats.
Like other Procellariforms, introduced predators (rats and cats) must be their main threats at breeding colonies. In addition, fledglings are attracted to artificial lights at night during their maiden flights from nests to the sea. On Tenerife, Canary Islands, a decline on the number of birds attracted to lights have been reported, suggesting a population decline on the island.
References.
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