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Black-throated Diver Gavia arctica [Linnaeus, 1758]
Other Names
Trends & Distribution
Breeding & Survival
Biometrics
Books & Links
Order:
Gaviiformes
Family:
Gaviidae
BTO Codes:
BV , BLTDI
EURING No:
30
Number in Britain:
172 pairs (Summer)
Conservation Status:
UK:
AMBER
European:
3 Concern, most not in Europe; Vulnerable
Global:
Least Concern
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IBC
Status in UK:
(A) Migrant/Resident Breeder, Winter Visitor
Subspecies:
arctica recorded in Britain (of 2 subsp. in the world)
.
Length:
66 cm
Wingspan:
120 cm
Weight:
M: 3.4 kg F: 2.3 kg
Scientific name from:
L.: Gavia , a seabird described by Pliny
and Gr.: arktikos =northern
World Distribution:
BREEDS: Eurasian arctic & w Alaska, WINTERS: south to s Europe, c Asia, se China and s Alaska
Habitat:
Deep lakes
Diet:
Fish at depths to 6m, usually submerged less than 1 minute
Population and Distribution
Population Trend:
No population trend available
Distribution:
No distribution maps available
British Population Size:
Summer:
155 to 189 pairs
in 1994
Winter:
700 individuals
in 1980-86
Note: Best estimate
First Record:
1743
Habitat Occupancy (in the Breeding Season):
No habitat data from BBS
European Population Size:
Summer:
16 to 22 thousand pairs
Birds in Europe
Listed on the Appendices/Schedules of:
WCA(I), WBD(I), Bern(II), Bonn(II*), AEWA
Breeding and Survival
Egg Size:
84 x 52 mm
Egg Weight:
122.0 g (of which 9 % is shell)
Number of Nest Records:
4
Clutch Size:
2 eggs
Incubation:
28 - 30 days
by the:
Male + Female
Fledging:
60 - 65 days
as:
Precocial, downy
First Clutches Laid:
Unavailable
Number of Broods:
1
Number Ringed:
1
Adult Survival:
No data
Juvenile Survival:
No data
Age at First Breeding:
Typical Lifespan:
No data
Maximum Recorded Age:
Too few ringed in Britain, but Germany : 27yr 1m
Biometrics
Ring Size:
Ke*
Wing Length
Adult:
Insufficient Data.
Juvenile:
Insufficient Data.
Male:
Insufficient Data
Female:
Insufficient Data
Weight
Adult:
Insufficient Data.
Juvenile:
Insufficient Data.
Male:
Insufficient Data
Female:
Insufficient Data
Other Names
Arctic Loon
Includes G. pacifica
Gaelic:
Learga-dhubh
Welsh:
Trochydd Gyddfddu
Danish:
Sortstrubet lom
Dutch:
Parelduiker
Finnish:
Kuikka
French:
Plongeon arctique
German:
Prachttaucher
Hungarian:
Sarki búvár
Icelandic:
Glitbrúsi
Irish:
Lóma Artach
Italian:
Strolaga mezzana
Norwegian:
Storlom
Polish:
Nur czarnoszyi
Portuguese:
Mobêlha-árctica
Spanish:
Colimbo ártico
Swedish:
Storlom
For More Information...
Books and Monographs:
Rankin, N. 1947 The haunts of British divers Collins, London
[998 RAN]
See Also:
BirdFacts home | BTO Home birdfacts@bto.org These data should be cited as:
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