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Stercorarius pomarinus

(Temminck, 1815)

Pomarine Jaeger

G5Secure Found in 46 roadless areas NatureServe Explorer →
G5SecureGlobal Rank
Least concernIUCN
Pomarine Jaeger (Stercorarius pomarinus). © Ian Davies; Cornell Lab of Ornithology | Macaulay Library.
© Ian Davies; Cornell Lab of Ornithology | Macaulay Library
Pomarine Jaeger (Stercorarius pomarinus). © Ryan Justice; Cornell Lab of Ornithology | Macaulay Library.
© Ryan Justice; Cornell Lab of Ornithology | Macaulay Library
Pomarine Jaeger (Stercorarius pomarinus). © Andrew Spencer; Cornell Lab of Ornithology | Macaulay Library.
© Andrew Spencer; Cornell Lab of Ornithology | Macaulay Library
Pomarine Jaeger (Stercorarius pomarinus). © Michael Sandoz; Cornell Lab of Ornithology | Macaulay Library.
© Michael Sandoz; Cornell Lab of Ornithology | Macaulay Library
Pomarine Jaeger (Stercorarius pomarinus). © Blair Dudeck; Cornell Lab of Ornithology | Macaulay Library.
© Blair Dudeck; Cornell Lab of Ornithology | Macaulay Library
Pomarine Jaeger (Stercorarius pomarinus). © Cedrik von Briel; Cornell Lab of Ornithology | Macaulay Library.
© Cedrik von Briel; Cornell Lab of Ornithology | Macaulay Library
Pomarine Jaeger (Stercorarius pomarinus). Photo by U.S. Fish & Wildlife Service, Public Domain (U.S. Government Work), via ECOS.
U.S. Fish & Wildlife Service, https://www.usa.gov/government-works
Identity
Unique IDELEMENT_GLOBAL.2.106141
Element CodeABNNM01010
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVertebrate Animal
IUCNLeast concern
Endemicoccurs (regularly, as a native taxon) in multiple nations
KingdomAnimalia
PhylumCraniata
ClassAves
OrderCharadriiformes
FamilyStercorariidae
GenusStercorarius
Other Common Names
Labbe pomarin (FR) Mindrião-Pomarino (PT) Salteador Pomarino, Pagalo (ES)
Concept Reference
American Ornithologists' Union (AOU). 1998. Check-list of North American birds. Seventh edition. American Ornithologists' Union, Washington, D.C. [as modified by subsequent supplements and corrections published in The Auk]. Also available online: http://www.aou.org/.
Taxonomic Comments
Perhaps is more closely related to catharacta than other Stercorarius (AOU 1998).
Conservation Status
Rank MethodExpertise without calculation
Review Date2016-04-10
Change Date1996-11-26
Range Extent Comments
BREEDING: western and northern Alaska, arctic Canada, Greenland, Spitsbergen, northern Eurasia. Nonbreeders occur in summer off Alaska and British Columbia, in central Canada, and in Atlantic from Labrador and Newfoundland south to New England. NON-BREEDING: at sea primarily from latitude of North Carolina to West Indies and off Africa; latitude of southern California south to Peru, and off eastern Australia; regularly in low numbers near Hawaii.
Ecology & Habitat

Habitat

NON-BREEDING: primarily pelagic, less often in bays and harbors, casually on large inland bodies of water (AOU 1983, Pratt et al. 1987). BREEDING: Nests on swampy or mossy tundra, and flats near seacoasts; on the ground in a shallow depression on mound on elevated site. Breeding distribution varies with abundance of small mammals (especially brown lemming).

Reproduction

Lays 2-3 eggs in June. Both sexes incubate eggs for 27-28 days. Nestlings semi-precocial and downy. Capable of first flight 35-42 days after hatching (Terres 1980); fledging requires 28-37 days (average about 31 days), occurs generally in mid-August in northern Alaska (see Johnson and Herter 1989). May not breed in years with low lemming populations. Density 6-8 pairs per sq km in northern Alaska in years when lemming abundant.
Terrestrial Habitats
Tundra
Palustrine Habitats
Riparian
Other Nations (2)
United StatesN5B
ProvinceRankNative
VermontSNAYes
MarylandSNAYes
New YorkSNRNYes
WashingtonS4NYes
AlabamaSNRNYes
IndianaSNAYes
South CarolinaSNAYes
MaineS2NYes
OregonSNAYes
MichiganSNRNYes
Rhode IslandSNAYes
TexasSNAYes
New JerseyS4NYes
HawaiiSNAYes
FloridaSNRNYes
MississippiSNAYes
DelawareSNAYes
MassachusettsS3NYes
CaliforniaSNAYes
VirginiaSNAYes
North CarolinaSNAYes
New HampshireSNAYes
AlaskaS5BYes
GeorgiaSNRNYes
CanadaN5B
ProvinceRankNative
Prince Edward IslandSNAYes
ManitobaSNAYes
QuebecS3BYes
LabradorSNRMYes
Northwest TerritoriesS5Yes
Yukon TerritoryS2MYes
NunavutS4BYes
Nova ScotiaSNAYes
British ColumbiaS4MYes
Island of NewfoundlandSNRMYes
New BrunswickS4MYes
OntarioS3MYes
Threat Assessments
ThreatScopeSeverityTiming
11 - Climate change & severe weatherPervasive (71-100%)UnknownLow (long-term)
11.1 - Habitat shifting & alterationPervasive (71-100%)UnknownLow (long-term)

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Roadless Areas (46)
Alaska (40)
AreaForestAcres
Bering LakeChugach National Forest965,076
Bering LakeChugach National Forest965,076
Chugach-11Chugach National Forest104
Chugach-11Chugach National Forest104
Chugach-12Chugach National Forest8,116
Chugach-12Chugach National Forest8,116
Chugach-14Chugach National Forest184
Chugach-14Chugach National Forest184
Chugach-15Chugach National Forest56
Chugach-15Chugach National Forest56
Chugach-17Chugach National Forest19,954
Chugach-17Chugach National Forest19,954
Chugach-19Chugach National Forest18
Chugach-19Chugach National Forest18
Chugach-3Chugach National Forest27,386
Chugach-3Chugach National Forest27,386
College FiordChugach National Forest1,130,818
College FiordChugach National Forest1,130,818
Copper River WetlandsChugach National Forest85,972
Copper River WetlandsChugach National Forest85,972
Fidalgo-GravinaChugach National Forest257,968
Fidalgo-GravinaChugach National Forest257,968
Kenai MountainsChugach National Forest306,600
Kenai MountainsChugach National Forest306,600
MontagueChugach National Forest204,875
MontagueChugach National Forest204,875
MontagueChugach National Forest204,875
Nellie JuanChugach National Forest713,697
Nellie JuanChugach National Forest713,697
North KruzofTongass National Forest33,146
Port AlexanderTongass National Forest120,681
Prince William Sound Is.Chugach National Forest118,698
Prince William Sound Is.Chugach National Forest118,698
Prince William Sound Is.Chugach National Forest118,698
Sheridan GlacierChugach National Forest224,683
Sheridan GlacierChugach National Forest224,683
Upper SitukTongass National Forest16,789
Upper SitukTongass National Forest16,789
Yakutat ForelandsTongass National Forest323,648
Yakutat ForelandsTongass National Forest323,648
Oregon (6)
AreaForestAcres
TenmileSiuslaw National Forest10,818
TenmileSiuslaw National Forest10,818
Umpqua SpitSiuslaw National Forest2,090
Umpqua SpitSiuslaw National Forest2,090
WoahinkSiuslaw National Forest5,309
WoahinkSiuslaw National Forest5,309
References (23)
  1. American Ornithologists' Union (AOU). 1983. Check-list of North American Birds, 6th edition. Allen Press, Inc., Lawrence, Kansas. 877 pp.
  2. American Ornithologists' Union (AOU). 1998. Check-list of North American birds. Seventh edition. American Ornithologists' Union, Washington, D.C. [as modified by subsequent supplements and corrections published in <i>The Auk</i>]. Also available online: http://www.aou.org/.
  3. BirdLife International. 2004b. Threatened birds of the world 2004. CD ROM. BirdLife International, Cambridge, UK.
  4. Braun, M. J., D. W. Finch, M. B. Robbins, and B. K. Schmidt. 2000. A field checklist of the birds of Guyana. Smithsonian Institution, Washington, D.C.
  5. Castro, I. and A. Phillips. 1996. A guide to the birds of the Galapagos Islands. Princeton University Press, Princeton, New Jersey, USA.
  6. Furness, R. W. 1987. The skuas. T & A D Poyser Ltd., Calton, England. 336 pp.
  7. Furness, R. W. 1996. Family Stercoriidae (Skuas). Pages 556-571 in J. del Hoyo, A. Elliott, and J. Sargatal (Eds.) Handbook of the birds of the world. Vol. 3. Lynx Editions, Barcelona, Spain.
  8. Godfrey, W.E. 1966. The birds of Canada. National Museums of Canada. Ottawa. 428 pp.
  9. Godfrey, W. E. 1986. The birds of Canada. Revised edition. National Museum of Natural Sciences, Ottawa. 596 pp. + plates.
  10. Harrison, C. 1978. A Field Guide to the Nests, Eggs and Nestlings of North American Birds. Collins, Cleveland, Ohio.
  11. Howell, S. N. G., and S. Webb. 1995. A guide to the birds of Mexico and northern Central America. Oxford University Press, Oxford, UK.
  12. Jaramillo, A. 2003. Birds of Chile. Princeton University Press, Princeton, New Jersey, USA.
  13. Johnson, S. R. and D. R. Herter. 1989. The Birds of the Beaufort Sea. BP Exploration (Alaska) Inc., Anchorage, Alaska. 372 pp.
  14. Maher, W. J. 1974. Ecology of pomarine, parasitic, and long-tailed jaegers in northern Alaska. Cooper Ornithol. Soc. 148 pp.
  15. Narosky, T. and D. Yzurieta. 2003. Birds of Argentina and Uruguay. Asociación Ornitológica del Plata, Buenos Aires, Argentina.
  16. Parker III, T. A., D. F. Stotz, and J. W. Fitzpatrick. 1996. Ecological and distributional databases for neotropical birds. The University of Chicago Press, Chicago.
  17. Pratt, H. D., P. L. Bruner, and D. G. Berrett. 1987. A Field Guide to the Birds of Hawaii and the Tropical Pacific. Princeton University Press, Princeton, New Jersey. 409 pp. + 45 plates.
  18. Raffaele, H., J. Wiley, O. Garrido, A. Keith, and J. Raffaele. 1998. A guide to the birds of the West Indies. Princeton University Press, Princeton, NJ. 511 pp.
  19. Ridgely, R. S. 2002. Distribution maps of South American birds. Unpublished.
  20. Sibley, D. A. 2000a. The Sibley guide to birds. Alfred A. Knopf, New York.
  21. Terres, J. K. 1980. The Audubon Society encyclopedia of North American birds. Alfred A. Knopf, New York.
  22. Wiley, R. H., and D. S. Lee. 1999. Parasitic Jaeger (S<i>tercorarius parasiticus</i>). No. 445 in A. Poole and F. Gill, eds. The birds of North America. The Birds of North America, Inc., Philadelphia, PA. 28 pp.
  23. Zook, J. L. 2002. Distribution maps of the birds of Nicaragua, Costa Rica, and Panama. Unpublished.