This species qualifies as Vulnerable because it has a very small breeding range at three or four locations, and is therefore susceptible to stochastic events or human impacts. It is likely to have been extirpated from one island some time ago, but the bulk of the population is presumably stable.
Brooke, M. de L. 2004. Albatrosses and Petrels Across the World. Oxford University Press, Oxford.
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#.
26 cm. Small, typical "M" marked gadfly petrel. Dark grey upperparts with sharp "M" mark. White forehead but dark grey cap and mask, extending to grey half-collar on upper breast. Dark grey rump and uppertail-coverts. Paler outer tail feathers. White throat and lower chest/belly. Predominantly white underwing, but black tip and narrow trailing edge, extending to leading edge. Similar spp. Separated from most other small gadfly petrels by whiter underwing. Cook's Petrel P. cookii has shorter and thinner bill and shorter tail. Stejneger's Petrel P. longirostris has paler crown and nape, and lacks darker central tail feathers. Pycroft's Petrel P. pycrofti is possibly inseparable, but ranges may not overlap.
Brooke, M. De L. 2004. Albatrosses and petrels across the world. Oxford University Press, Oxford.
Collar, N. J.; Gonzaga, L. P.; Krabbe, N.; MadroÃ±o Nieto, A.; Naranjo, L. G.; Parker, T. A.; Wege, D. C. 1992. Threatened birds of the Americas: the ICBP/IUCN Red Data Book. International Council for Bird Preservation, Cambridge, U.K.
Giglioli; Salvadori. 1869. Pterodroma arminjoniana arminjoniana, Pterodroma defilippiana, Puffinus assimilis elegans. Ibis New ser. Vol. 5: 62-63, 68.
Howell, S. N. G.; Webb, S.; Spear, L. B. 1996. Identification at sea of Cook's, de Filippi's and Pycroft's petrels. Western Birds 27: 57-64.
Hulm, P. 1995. Robinson Crusoe's Islands face an uncertain future. Plant Talk: 19-21.
Roberson, D.; Bailey, S. F. 1991. Cookilaria Petrels in the eastern Pacific Ocean. American Birds 45: 1067-1081.
Sibley, C. G.; Monroe, B. L. 1990. Distribution and taxonomy of birds of the world. Yale University Press, New Haven, USA.
Spear, L. B.; Howell, S. N. G.; Ainley, D. G. 1992. Notes on the at-sea identification of some Pacific gadfly petrels (Genus: Pterodroma). Colonial Waterbirds 15: 202-218.
Further web sources of information
Explore HBW Alive for further information on this species
Text account compilers
Bird, J., Clay, R., Temple, H.
IUCN Red List evaluators
Butchart, S., Symes, A.
BirdLife International (2016) Species factsheet: Pterodroma defilippiana. Downloaded from http://www.birdlife.org on 22/10/2016. Recommended citation for factsheets for more than one species: BirdLife International (2016) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 22/10/2016.
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.
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Additional resources for this species
|Current IUCN Red List category||Vulnerable|
|Family||Procellariidae (Petrels, Shearwaters)|
|Species name author||(Giglioli & Salvadori, 1869)|
|Population size||6000-15000 mature individuals|
|Distribution size (breeding/resident)||1,770,000 km2|
|Links to further information|
|- Additional Information on this species|