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Black Petrel Procellaria parkinsoni

Justification
This species qualifies as Vulnerable because it breeds on just two very small islands where introduced predators are a potential threat. The population is assumed to be stable, but if a decline is detected, the species should be uplisted to Endangered.

Taxonomic source(s)
Brooke, M. de L. 2004. Albatrosses and Petrels Across the World. Oxford University Press, Oxford.
Christidis, L.; Boles, W. E. 2008. Systematics and taxonomy of Australian birds. CSIRO Publishing, Collingwood, Australia.
del Hoyo, J.; Collar, N. J.; Christie, D. A.; Elliott, A.; Fishpool, L. D. C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Barcelona, Spain and Cambridge UK: Lynx Edicions and BirdLife International.
SACC. 2006. A classification of the bird species of South America. Available at: #http://www.museum.lsu.edu/~Remsen/SACCBaseline.html#.
Turbott, E. G. 1990. Checklist of the birds of New Zealand. Ornithological Society of New Zealand, Wellington.

Identification
46 cm. Large, black petrel, becoming more brown as plumage ages. Undersides of primaries may appear silvery. Yellow-white bill on adults, blue-white on juveniles, has black tip. Black legs, feet. Similar spp. Smallest Procellaria species. Smaller, especially bill, than Westland Petrel P. westlandica and has less laboured flight. Large, all-dark Flesh-footed Shearwater P. carneipes have pink feet and distinctive flight. Voice Varied calls at colony after dark.

Distribution and population
Procellaria parkinsoni breeds on Great and Little Barrier Islands, New Zealand, where the populations number c.1,300 pairs (E. A. Bell et al. 2009) and 100 pairs respectively, equating to a total population of c.5,000 individuals (Taylor 2000). The estimate of 1,300 pairs on Great Barrier Island is lower than previously thought but probably reflects improved information rather than a decline; however, it is not a complete survey and, although it covers the majority of the island's population, further research is needed to assess the true population size. It once bred in the mountains of the North and South Islands, but had disappeared from the mainland by the 1960s. On Little Barrier, it was abundant in the late 1800s but the population was decimated, mainly by feral cats, until predators were eradicated in 1980. On Great Barrier, the population may be in decline (Bell et al. 2011, E. Bell in litt. 2012). It migrates to the eastern Pacific Ocean between the Galápagos Islands, southern Mexico and northern Peru (Heather and Robertson 1997).


Population justification
The total population is c.1,300 pairs on Great Barrier Island and c.100 breeding pairs on Little Barrier Island (Bell et al. 2011), with an estimated total of c.5,000 individuals including non-breeding birds. This is roughly equivalent to 3,300 mature individuals.

Trend justification
Overall, declines may have occurred in the global population over the past three generations because on Little Barrier the population was reduced by predation to only 50-100 pairs. On Great Barrier, the population is thought to be stable (Marchant and Higgins 1990, Taylor 2000), and a slow increase is suspected on Little Barrier.

Ecology
Behaviour It is a colonial burrow-nesting, annually-breeding species (ACAP 2009) and can begin breeding at six years of age (Heather and Robertson 1997). Most eggs are laid in December, hatch in February and chicks fledge in May at about three months old. Chick provisioning can continue until June (Bell et al. 2009). The youngest recorded bird returning to a colony was three years of age, and the age of first breeding has been recorded at five years of age (Bell et al. 2009). Feeding behaviour is characterised by surface feeding and shallow diving in groups of up to 300 individuals that are frequently seen to associate with fishing vessels and cetaceans. Preliminary geolocator data suggest that it preferentially forages on the continental shelf or at seamounts (ACAP 2008), with most foraging trips taking at least 15 days (Bell et al. 2009). Further data suggest foraging areas are highly variable, although birds travel mainly west and east of northern New Zealand (Bell et al. 2009). Habitat Breeding It nests in virgin podocarp and mixed broadleaf forest above 500 m. On the mainland, it reportedly bred up to 1,200 m, mostly in tall forest, but also in alpine tussock grasslands (Marchant and Higgins 1990). Diet Its diet is dominated by squid and supplemented by tunicates, crustaceans and cyclostomes (Bell et al. 2009).

Threats
Introduced cats decimated the Little Barrier population, killing up to 100% of fledglings in some years (Imber 1987), and taking adults. Introduced cats cause minor interference on Great Barrier, but breeding success is high (77% in 2007/2008) (Bell et al. 2011). Pacific rat Rattus exulans is present on Great Barrier Island but has little effect on this species. Pacific rats were eradicated from Little Barrier Island in 2004. Black rat R. rattus, stray dogs, feral cats and feral pigs may also be a threat on Great Barrier. The species is a common scavenger of fishing boat waste, and is caught by commercial longliners and recreational fishers in New Zealand waters, and may be at greater risk during migration to the east Pacific off Ecuador and Peru where it is a near-obligate associate of small crustaceans (Pitman and Ballance 1992). Birds have been caught on longlines in this region. El Niño fluctuations may also affect the population in this zone (Taylor 2000). The species is potentially threatened by climate change because it has a geographically bounded distribution: its altitudinal distribution falls entirely within 1,000 m of the highest mountain top within its range (621 m) (BirdLife International unpublished data).

Conservation Actions Underway
CMS Appendix II and ACAP Annex 1. Cats were eradicated on Little Barrier Island by 1980. Between 1986 and 1990, 249 fledglings were transferred from Great Barrier to Little Barrier in an attempt to boost population size. Follow-up monitoring indicates mixed results (Imber et al. 2003). The colony on Little Barrier was monitored every breeding season until 2000 (Heather and Robertson 1997, E. Bell in litt. 2012). A long-term population study was initiated on Great Barrier in 1996 to study populations annually to determine trends and assess breeding success (Taylor 2000, Bell et al. 2007). Tracking research has been completed on both Little Barrier and Great Barrier (E. Bell in litt. 2012). Feral cat trapping was undertaken on Great Barrier Island in 2011/2012 and is scheduled to continue in future breeding seasons, along with a rodent control programme (per E. Bell in litt. 2012). Rattus exulans was eradicated from Little Barrier in 2004 (E. Bell in litt. 2012).
Conservation Actions Proposed
Complete an accurate census of both islands and follow-up reports of mainland breeding sites. Monitor Great Barrier study populations annually to determine trends, and assess breeding success. Continue to develop mitigation devices/techniques to minimise fisheries bycatch (Taylor 2000). Continue and expand control at Great Barrier if monitoring indicates that any predators are causing a population decline, and eradicate R. exulans from Little Barrier (Taylor 2000).

Related state of the world's birds case studies

References
ACAP. 2009. ACAP Species Assessment: Black Petrel Procellaria parkinsoni. Available at: #http://www.acap.aq/acap-species/download-document/1196-black-petrel#.

Bell, E. A.; Sim, J. L.; Scofield, P. 2007. Demographic parameters of the Black Petrel (Procellaria parkinsoni). Department of Conservation, Wellington, N.Z.

Bell, E. A.; Sim, J. L.; Scofield, P. 2009. Population parameters and distribution of the Black Petrel (Procellaria parkinsoni), 2005/06. Department of Conservation, Wellington, N.Z.

Bell, E. A.; Sim, J. L.; Scofield, P. 2011. Population parameters and distribution of the black petrel (Procellaria parkinsoni) on Great Barrier Island (Aotea Island), 2007/08. DOC Marine Conservation Services Series 8. Department of Conservation, Wellington.

Heather, B. D.; Robertson, H. A. 1997. The field guide to the birds of New Zealand. Oxford University Press, Oxford, UK.

Imber, M. J. 1987. Breeding ecology and conservation of the Black Petrel (Procellaria parkinsoni). Notornis 34: 19-39.

Imber, M. J.; McFadden, I.; Bell, E. A.; Scofield, R. P. 2003. Post-fledging migration, age of first return and recruitment,and results of inter-colony translocation of black petrels (Procellaria parkinsoni). Notornis 50: 183-190.

Marchant, S.; Higgins, P. J. 1990. Handbook of Australian, New Zealand and Antarctic birds, 1: ratites to ducks. Oxford University Press, Melbourne.

Pitman, R. L.; Ballance, L. T. 1992. Parkinson's Petrel distribution and foraging ecology in the eastern Pacific: aspects of an exclusive feeding relationship with dolphins. Condor 94: 825-835.

Taylor, G. A. 2000. Action plan for seabird conservation in New Zealand. Department of Conservation, Wellington.

Further web sources of information
Explore HBW Alive for further information on this species

Search for photos and videos, and hear sounds of this species from the Internet Bird Collection

Text account compilers
Bird, J., Black, A., Calvert, R., Martin, R, Small, C., Taylor, J., Symes, A. & Anderson, O.

Contributors
Bell, E., Debski, I., Taylor, G. & Weeber, B.

IUCN Red List evaluators
Butchart, S., Taylor, J.

Recommended citation
BirdLife International (2014) Species factsheet: Procellaria parkinsoni. Downloaded from http://www.birdlife.org on 20/12/2014. Recommended citation for factsheets for more than one species: BirdLife International (2014) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 20/12/2014.

This information is based upon, and updates, the information published in BirdLife International (2000) Threatened birds of the world. Barcelona and Cambridge, UK: Lynx Edicions and BirdLife International, BirdLife International (2004) Threatened birds of the world 2004 CD-ROM and BirdLife International (2008) Threatened birds of the world 2008 CD-ROM. These sources provide the information for species accounts for the birds on the IUCN Red List.

To provide new information to update this factsheet or to correct any errors, please email BirdLife

To contribute to discussions on the evaluation of the IUCN Red List status of Globally Threatened Birds, please visit BirdLife's Globally Threatened Bird Forums.

Additional resources for this species

ARKive species - Parkinson's petrel (Procellaria parkinsoni) 0

Key facts
Current IUCN Red List category Vulnerable
Family Procellariidae (Petrels, Shearwaters)
Species name author Gray, 1862
Population size 3300 mature individuals
Population trend Stable
Distribution size (breeding/resident) 29,900,000 km2
Country endemic? Yes
Links to further information
- Additional Information on this species