Arctic Skua Stercorarius parasiticus   [Linnaeus, 1758]

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   Page updated:16-January-2013

Order: Charadriiformes Family: Stercorariidae
BTO Codes: AC, ARCSK EURING No: 5670
Number in Britain: 2100 pairs (Summer)
Conservation Status:
UK: RED
European: Not a species of concern
Global: (Details)
Links to: Images   Videos   Sound  
Status in UK: (A)  Migrant Breeder, Passage Visitor
Subspecies: Monotypic
.
Length: 44 cm Wingspan: 118 cm Weight: M/F: 450 g    
Scientific name from: L.: stercus=dung + -arius=belonging to and L.: parasiticus=parasitic
World Distribution: BREEDS: n Eurasia, n North America, WINTERS: southern oceans
Habitat: Coastal tundra, in winter seacoasts
Diet: Summer, mostly birds, small mammals, insects, Winter, fish, mostly by piracy from other birds
TitBit: The Arctic Skua is an avian pirate, constantly harassing other seabirds for their recent catches, their consummate aerial dexterity inspired the name for the RAF's first naval dive-bomber, the Blackburn Skua.  

Population and Distribution

Population Trend: JNCC Seabird Monitoring Programme
Distribution: Atlas Maps   
British Population Size:
    Summer: 2136 pairs in 1998-02
    First Record: 1713
    Latest Survey: Mitchell, P.I. et al. (2004) Seabird populations of Britain and Ireland Poyser, London
    Conservation Status: RED because Recent Breeding Population Decline (1981-2007),
   Previous Assessments: 2002-2007 GREEN     1996-2001 GREEN  
   Races of Concern:
Habitat Occupancy (in the Breeding Season):
    No habitat data from BBS
Migration routes: Map of foreign ringing recoveries  and summary map from Time to Fly (in pop-up windows)
European Population Size:
    Summer: 20 to 40 thousand pairs
Population Assesment from Birds in Europe
Distribution in Europe mapped by the EBCC Atlas
Listed on the Appendices/Schedules of: Bern(III)
Survey Results: Results from BirdTrack
Summary text from Seabird 2000 (warning: link to large pdf)

Breeding and Survival

Egg Size: 58 x 40 mm Egg Weight: 48.0 g (of which 6 % is shell)
Number of Nest Records: 6
Clutch Size: 2 eggs
Incubation: 25- 28 days   by the: Male + Female
Fledging: 25 - 30days as: Altricial, downy
First Clutches Laid: Unavailable
Number of Broods: 1
Number Ringed: Annual Totals
Adult Survival: 0.886       
Juvenile Survival: 0.680 (in First-Year)  
Age at First Breeding: 4 years Typical Lifespan: 12 years
Maximum Recorded Age: 25 years 10 months 24 days (set in 2003)
Read a summary of Ringing Recoveries

Biometrics

Ring Size: E
Wing Length Adult: 327.8 ± 8.3     Range 311.0 - 351.0 mm, (N = 35)
Juvenile: Insufficient Data
Male: Insufficient Data
Female: Insufficient Data
Weight Adult: 420.9 ± 37.93 Range 330.0 - 483.0 g , (N =36)
Juvenile: Insufficient Data
Male: Insufficient Data
Female: Insufficient Data
Seasonal: Summer 420.9 ± 36.74 (N = 47)  
Source: British Trust for Ornithology (2005) Ringing Scheme data

Other Names

Parasitic Jaeger
Gaelic: Fàsgadair Welsh: Sgiwen y Gogledd
Danish: Almindelig kjove Dutch: Kleine Jager
Finnish: Merikihu French: Labbe parasite
German: Schmarotzerraubmöwe Hungarian: Ékfarkú halfarkas
Icelandic: Kjói Irish: Meirleach Artach
Italian: Labbo Norwegian: Tyvjo
Polish: Wydrzyk ostrosterny Portuguese: Moleiro-parasítico
Spanish: Págalo parásito Swedish: Labb
Local Names:Scootie Allan

For More Information...

Books and Monographs:
   Phillips, R.A. 2001 BWP Update 3:25-41
   Furness, R.W. 1987 The skuas Poyser, Calton [598.614 FUR]
   O'Donald, P. 1983 The arctic skua Cambridge University Press, Cambridge
See Also:
Find scientific papers on Google Scholar or Scirus by clicking the icon
Wikipedia entry
BirdLife species page
Recent sightings and information from BirdGuides
Details from the Patuxent Bird Identification Infocenter
Read State of the Nations Birds by Chris Mead