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Oceanodroma hornbyi

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Taxonomy [top]

Kingdom Phylum Class Order Family
ANIMALIA CHORDATA AVES PROCELLARIIFORMES HYDROBATIDAE

Scientific Name: Oceanodroma hornbyi
Species Authority: (G. R. Gray, 1864)
Common Name/s:
English Ringed Storm-petrel, Hornby's Storm Petrel, Ringed Storm-Petrel

Assessment Information [top]

Red List Category & Criteria: Data Deficient ver 3.1
Year Published: 2012
Date Assessed: 2012-05-01
Assessor/s: BirdLife International
Reviewer/s: Butchart, S. & Symes, A.
Facilitator/s: Benstead, P., Isherwood, I., Sharpe, C J, Symes, A.

Geographic Range [top]

Range Description: Oceanodroma hornbyi has been observed in thousands in the eastern Pacific Ocean, along the coast of Peru and Chile (Carboneras 1992c). Data on overall numbers and trends are lacking, and the breeding grounds have never been found (Carboneras 1992c, Brooke 1999, 2000). At-sea distribution and observations of grounded birds indicate that it nests between 20° and 25°S in Chile and perhaps north into Peru (Brooke 1999). Birds may breed on offshore islands or mainland cliffs, but the coast of north Chile is distinctly bereft of islands and the cliffs are largely devoid of deep rocky crevices or soil in which petrels might burrow (Brooke 1999). It is most likely to nest in the Atacama Desert, and there are reports of mummified adults and fledglings found up to 50 km inland and 1,500 m above sea level (Tobias et al. 2006).

Countries:
Native:
Chile; Peru
Vagrant:
Colombia; United States
Present - origin uncertain:
Ecuador
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: Brooke (2004) estimated the global population to number at least thousands of individuals (possibly up to tens of thousands of individuals). It is thus estimated to range between 1,000-90,000 individuals, roughly equating to 670-60,000 mature individuals.
Population Trend: Unknown

Habitat and Ecology [top]

Habitat and Ecology: It may breed on offshore islands or mainland cliffs, but is most likely to nest inland in the arid Atacama Desert.

Systems: Terrestrial; Marine

Threats [top]

Major Threat(s): Until the breeding grounds are found, the extent to which it is threatened by mining-related activity will remain unknown (Brooke 1999).

Conservation Actions [top]

Conservation Actions: Conservation Actions Underway
None is known.

Conservation Actions Proposed
Search for breeding colonies on offshore islands, coastal cliffs and the arid hinterland of the Antofagasta region in March-July, looking for burrows and signs of nesting, listening for night-time flight calls and following up reports of dead or grounded fledglings inland (Tobias et al. 2006).

Citation: BirdLife International 2012. Oceanodroma hornbyi. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.2. <www.iucnredlist.org>. Downloaded on 17 April 2014.
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