Collar wave runner

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Collar wave runner
Hornby storm petrel1a.jpg

Collared wave runner ( Oceanodroma hornbyi )

Systematics
Class : Birds (aves)
Order : Tubular noses (Procellariiformes)
Family : Northern petrels (Hydrobatidae)
Genre : Wave runner ( Oceanodroma )
Type : Collar wave runner
Scientific name
Oceanodroma hornbyi
( Gray , 1854)

The collar wave runners ( Oceanodroma hornbyi ) is a little-known species from the family of Northern petrels (Hydrobatidae). It occurs on the west coast of South America. The specific epithet honors Admiral Phipps Hornby .

features

Illustration of the bird ( Joseph Smit , 1896)

The collar waveguide reaches a size of 21 to 23 centimeters. It is the only wave runner with a black head cap. The top is light, the underside is white with a characteristic gray collar. The forehead and the neck collar are white. A white stripe above the eyes as in other types of wave runner is missing. The young birds probably look similar to the adults.

habitat

The collared waver usually forages far from the coast across the open ocean.

Eating behavior

Little information is available about food behavior. It catches its prey in flight and on the surface of the water.

hikes

Collared wafers presumably hunt distributed over the waters of the Humboldt Current in the vicinity of the breeding areas. The species is occasionally seen north of the equator between August and December. A stray visitor has been sighted in southern California.

Reproductive behavior

Nothing is known about the reproductive behavior. The distribution over the sea and observations of stranded birds suggest that the breeding areas are between the 20th and 25th parallel in Chile and probably northwards to southern Peru. Possible breeding sites could be islands near the coast and mainland cliffs. However, the coast in northern Chile is poor in islands and the cliffs are largely devoid of deep crevices or rocky floors in which the species could build their nests. It is more likely that the breeding areas are in the Atacama Desert , as there have been reports of mummified adult birds and birds that have just fledged that were discovered 50 km inland at an altitude of 1500 m. In 2017, a team of ornithologists succeeded in finding a first nest 70 km from the coast in the Atacama Desert.

Existence and endangerment

Due to the lack of data, BirdLife International lists this species in the “ data deficient ” category . BirdLife's very rough population estimate of 1,000 to 90,000 specimens is based on observations over the ocean.

literature

Web links