Great Northern Diver Gavia immer [Brünnich, 1764] |
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Other Names
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Trends & Distribution
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Breeding & Survival
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Biometrics
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Books & Links
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For details point at or click the |
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Order:
Gaviiformes
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Family: Gaviidae |
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BTO Codes:
ND, GRNDI
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EURING No: 40 | |
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Number in Britain:
2500 birds (Winter)
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Conservation Status:
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Status in UK:
(A) Scarce Breeder, Winter Visitor
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Subspecies:
Monotypic
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Length:
80 cm
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Wingspan: 137 cm |
Weight:
M/F: 4 kg
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Scientific name from:
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L.: Gavia, a seabird described by Pliny and Icelandic: himbrimi=surf-roarer |
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World Distribution:
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BREEDS: Greenland, Iceland, n Scotland, n North America, WINTERS: south to nw Africa, s Europe and s US |
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Habitat:
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Lakes, ponds & rivers |
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Diet:
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Mostly fish (to 28cm) also large invertebrates, amphibians |
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TitBit:
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The eerie, haunting cry of the diver gave rise to their original name - the Loon, which now used by Americans. |
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Population and Distribution |
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British Population Size:
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Winter:
2500 individuals
in 2004-09
Note: Best estimate
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First Record:
1634
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First Breeding Record:
Wester Ross 1970
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Conservation Status:
AMBER
because
Important Non-breeding Population
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Previous Assessments:
2002-2007
AMBER
1996-2001
AMBER
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Habitat Occupancy (in the Breeding Season):
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| No habitat data from BBS | ||||||
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European Population Size:
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Summer:
700 to 2 thousand pairs
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Population Assesment from Birds in Europe
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Distribution in Europe
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Listed on the Appendices/Schedules of:
WCA(I), Bern(II), Bonn(II*)
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Breeding and Survival |
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Egg Size:
90 x 58 mm
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Egg Weight: 167.0 g (of which 11 % is shell) | ||
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Number of Nest Records:
0
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Clutch Size:
2 eggs
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Incubation:
24- 25 days
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by the: Male + Female |
Fledging:
70 - 77days
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as:
Precocial, downy
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First Clutches Laid:
Unavailable
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Number of Broods:
1
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Number Ringed:
0
(Annual Totals)
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Adult Survival:
No data
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Juvenile Survival:
No data
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Age at First Breeding:
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Typical Lifespan:
No data
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Maximum Recorded Age:
Too few birds ringed
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Summary of Ringing Recoveries
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Biometrics |
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Ring Size:
Check with Ringing Unit
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Wing Length
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Adult: | Insufficient Data | ||
| Juvenile: | Insufficient Data | |||
| Male: | Insufficient Data | |||
| Female: | Insufficient Data | |||
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Weight
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Adult: | Insufficient Data | ||
| Juvenile: | Insufficient Data | |||
| Male: | Insufficient Data | |||
| Female: | Insufficient Data | |||
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Other Names |
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| Common Loon | |
| Gaelic: Muir-bhuachaille | Welsh: Trochydd Mawr |
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Danish:
Islom
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Dutch: IJsduiker |
| Finnish: Amerikanjääkuikka | French: Plongeon imbrin |
| German: Eistaucher | Hungarian: Jeges búvár |
| Icelandic: Himbrimi |
Irish:
Lóma Mór
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| Italian: Strolaga maggiore | Norwegian: Islom |
| Polish: Nur lodowiec | Portuguese: Mobęlha-grande |
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Spanish:
Colimbo grande
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Swedish: Islom |
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For More Information... |
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Books and Monographs:
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| Rankin, N. 1947 The haunts of British divers Collins, London [998 RAN] | |
| See Also: | |
Find scientific papers on  Google Scholar
or  Scirus by clicking the icon
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Wikipedia entry
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BirdLife species page
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Recent sightings and information from BirdGuides
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All About Birds (Cornell Lab of Ornithology)
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Gough, G.A. et al. (1998) Patuxent Bird Identification Infocenter
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State of the Nations Birds by Chris Mead
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