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British Population Size:
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Summer:
11 thousand pairs
in 1998-02
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First Record:
Kent, 1784
[Fossil evidence from
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Latest Survey:
Mitchell, P.I. et al. (2004) Seabird populations of Britain and Ireland Poyser, London
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Conservation Status:
AMBER
because
Species of European Concern,
Recent Breeding Range Decline (1969-2007),
Localised Breeding Population,
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Previous Assessments:
2002-2007
AMBER
1996-2001
AMBER
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Races of Concern:
sandvicensis AMBER (Recent Decline)
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Habitat Occupancy (in the Breeding Season):
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No habitat data from BBS
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Migration routes:
Map of foreign ringing recoveries
and summary map from Time to Fly (in pop-up windows)
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Average Day of First Arrival:
27 Mar
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European Population Size:
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Summer:
67 to 100 thousand pairs
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Population Assesment from Birds in Europe
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Distribution in Europe mapped by the EBCC Atlas
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Listed on the Appendices/Schedules of:
WBD(I), Bern(III), Bonn(II*), AEWA
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Breeding and Survival
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Egg Size:
51 x 36 mm
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Egg Weight:
35.0 g (of which 6 % is shell)
|
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Number of Nest Records:
37
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Clutch Size:
1 - 2 eggs
|
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Incubation:
21- 29 days
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by the:
Male + Female
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Fledging:
28 - 30days
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as:
Semi-precocial, downy
|
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First Clutches Laid:
Unavailable
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Number of Broods:
1
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Number Ringed:
Annual Totals
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Adult Survival:
0.898
± 0.029
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Juvenile Survival:
0.358 (in First-Year)
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Age at First Breeding:
3
years
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Typical Lifespan:
12
years
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Maximum Recorded Age:
30 years 9 months 14 days (set in 1998)
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Read a summary of Ringing Recoveries
|
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Biometrics
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Ring Size:
D2
|
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Wing Length
|
Adult:
|
305.4 ± 6.9
Range
283.0 - 333.0 mm, (N = 30)
|
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Juvenile:
|
295.5 ± 8.8
Range
260.0 - 314.0 mm, (N = 215)
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Male:
|
Insufficient Data
|
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Female:
|
Insufficient Data
|
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Weight
|
Adult:
|
238.1 ± 14.47
Range
190.0 - 301.5 g , (N =32)
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Juvenile:
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224.8 ± 16.9
Range
170.0 - 285.0 . , (N =292)
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Male:
|
Insufficient Data
|
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Female:
|
Insufficient Data
|
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Seasonal:
|
Summer 237.5 ± 16.47 (N = 191)
Autumn 238.3 ± 17.40 (N = 357)
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Source:
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British Trust for Ornithology (2005) Ringing Scheme data
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Other Names
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Previously Thalasseus sandvicensis, Has Included Sterna acuflavida
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Gaelic:
Steàrnag-mhòr
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Welsh:
Morwennol Bigddu
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Danish:
Splitterne
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Dutch:
Grote stern
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Finnish:
Riuttatiira
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French:
Sterne caugek
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German:
Brandseeschwalbe
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Hungarian:
Kenti csér
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Icelandic:
Þaraþerna
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Irish:
Geabhróg Scothdhubh
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Italian:
Beccapesci
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Norwegian:
Splitterne
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Polish:
Rybitwa czubata
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Portuguese:
Garajau-comum
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Spanish:
Charrán patinegro
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Swedish:
Kentsk tärna
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