Great Northern Diver Gavia immer [Brünnich, 1764] |
|
| Jump to: Other Names | Trends & Distribution | Breeding & Survival | Biometrics | Books & Links |
|
|
||||
|
For details point at or click the |
Page updated:16-January-2013 |
|
Order:
Gaviiformes
|
Family: Gaviidae |
|
BTO Codes:
ND, GRNDI
|
EURING No: 40 | |
|
Number in Britain:
2500 birds (Winter)
|
||
|
Conservation Status:
|
||
|
|
||
|
|
||
|
|
||
| Links to: Images Videos Sound | ||
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 |
||||||
|
||||||
|
British Population Size:
|
||||
|
Winter:
2500 individuals
in 2004-09
Note: Best estimate
|
||||
|
First Record:
1666
|
||||
|
First Breeding Record:
Wester Ross 1970
|
||||
|
Conservation Status:
AMBER
because
Important Non-breeding Population
|
||||
|
Previous Assessments:
2002-2007
AMBER
1996-2001
AMBER
|
||||
| Races of Concern: | ||||
|
Habitat Occupancy (in the Breeding Season):
|
||||
| No habitat data from BBS | ||||
|
European Population Size:
|
||||
|
Summer:
700 to 2 thousand pairs
|
||||
| Population Assesment from Birds in Europe | ||||
| Distribution in Europe mapped by the EBCC Atlas | ||||
|
Listed on the Appendices/Schedules of:
WCA(I), Bern(II), Bonn(II*)
|
||||
|
||||
|
|
||||
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 - 77days
|
as:
Precocial, downy
|
|
First Clutches Laid:
Unavailable
|
|||
|
Number of Broods:
1
|
|||
|
Number Ringed:
Annual Totals
|
|
|
Adult Survival:
No data
|
Juvenile Survival:
No data
|
|
Age at First Breeding:
6
years
|
Typical Lifespan:
No data
|
|
Maximum Recorded Age:
Too few birds ringed
|
|
| Read a summary of Ringing Recoveries | |
|
|
|
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 | |
| Seasonal: | ||
|
|
||
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 | 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: | |
Find scientific papers on  Google Scholar
or  Scirus by clicking the icon
|
|
| Wikipedia entry | |
| BirdLife species page | |
| Recent sightings and information from BirdGuides | |
| All About Birds (from the Cornell Lab of Ornithology) | |
| Details from the Patuxent Bird Identification Infocenter | |
| Read State of the Nations Birds by Chris Mead | |
|
|
|