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Great Northern Diver Gavia immer [Brünnich, 1764]
Other Names
Trends & Distribution
Breeding & Survival
Biometrics
Books & Links
Order:
Gaviiformes
Family:
Gaviidae
BTO Codes:
ND , GRNDI
EURING No:
40
Number in Britain:
2800 birds (Winter)
Conservation Status:
UK:
AMBER
European:
Not a species of concern
Global:
Least Concern
View video clips from
IBC
Status in UK:
(A) Scarce Breeder, Winter Visitor
Subspecies:
Monotypic
.
Length:
80 cm
Wingspan:
137 cm
Weight:
M/F: 4 kg
Scientific name from:
L.: Gavia , a seabird described by Pliny
and Icelandic: himbrimi =surf-roarer
World Distribution:
BREEDS: Greenland, Iceland, n Scotland, n North America, WINTERS: south to nw Africa, s Europe and s US
Habitat:
Lakes, ponds & rivers
Diet:
Mostly fish (to 28cm) also large invertebrates, amphibians
TitBit:
The eerie, haunting cry of the diver gave rise to their original name - the Loon, which now used by Americans
Population and Distribution
Population Trend:
No population trend available
Distribution:
No distribution maps available
British Population Size:
Winter:
2500 to 3000 individuals
in 1974-84
Note: Best estimate
First Record:
1634
First Breeding Record:
Wester Ross 1970
Habitat Occupancy (in the Breeding Season):
No habitat data from BBS
European Population Size:
Summer:
700 to 2 thousand pairs
Birds in Europe
Listed on the Appendices/Schedules of:
WCA(I), Bern(II), Bonn(II*)
Survey Results:
Breeding and Survival
Egg Size:
90 x 58 mm
Egg Weight:
167.0 g (of which 11 % is shell)
Number of Nest Records:
0
Clutch Size:
2 eggs
Incubation:
24 - 25 days
by the:
Male + Female
Fledging:
70 - 77 days
as:
Precocial, downy
First Clutches Laid:
Unavailable
Number of Broods:
1
Number Ringed:
0
Adult Survival:
No data
Juvenile Survival:
No data
Age at First Breeding:
Typical Lifespan:
No data
Maximum Recorded Age:
Too few birds ringed
Biometrics
Ring Size:
Check with Ringing Unit
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
Common Loon
Gaelic:
Muir-bhuachaille
Welsh:
Trochydd Mawr
Danish:
Islom
Dutch:
IJsduiker
Finnish:
Amerikanjääkuikka
French:
Plongeon imbrin
German:
Eistaucher
Hungarian:
Jeges búvár
Icelandic:
Himbrimi
Irish:
Lóma Mór
Italian:
Strolaga maggiore
Norwegian:
Islom
Polish:
Nur lodowiec (lodowiec)
Portuguese:
Mobęlha-grande
Spanish:
Colimbo grande
Swedish:
Islom
For More Information...
Books and Monographs:
Rankin, N. 1947 The haunts of British divers Collins, London
[998 RAN]
See Also:
All About Birds (Cornell Lab of Ornithology)
Gough, G.A. et al. (1998) Patuxent Bird Identification Infocenter
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