name = Black-throated Diver
status = LC
status_system = iucn3.1
status_ref = [IUCN2006|assessors=
BirdLife International|year=2004|id=49672|title=Gavia arctica|downloaded= 2006-05-09]
image_width = 240px
genus = "
species = "G. arctica"
binomial = "Gavia arctica"
binomial_authority = (Linnaeus, 1758)
* "G. a. arctica"
* "G. a. "viridigularis"
Black-throated Diver ("Gavia arctica"), known in
North Americaas Arctic Loon, is a medium-sized member of the loonor diver family.
Breeding adults are 63 cm to 75 cm in length with a 100 cm to 122 cm wingspan, shaped like a smaller, sleeker version of the
Great Northern Diver. They have a grey head, black throat, white underparts and chequered black-and-white mantle. Non-breeding plumage is drabber with the chin and foreneck white. Its bill is grey or whitish and dagger-shaped. In all plumages a white flank patch distinguishes this species from all other divers including the otherwise almost identical Pacific Diver.
It breeds in
Eurasiaand occasionally in western Alaska. It winters at seaon large lakesover a much wider range.
species, like all divers, is a specialist fish-eater, catching its preyunderwater. It flies with neck outstretched.
The call is a yodelling high-pitched wail.
The Black-throated Diver is one of the species to which the "Agreement on the Conservation of African-Eurasian Migratory Waterbirds" (
Instructions for constructing and deploying artificial floating islands to provide Black-throated Divers with nesting opportunities are given in Hancock (2000).
September 6, 2007, RSPB Scotlandand the Scottish Natural Heritage(SNH) stated that it was surprised by an increase in the last 12 years in the breeding figures in the UKfor the Red-throated Diverand the rarer Black-throated Diver of 16% and 34% respectively due to the anchoringof 58 man-made raftsin lochs. Both species decreased elsewhere in Europe.
Dr Mark Eaton, RSPB
scientisttraced the drop in overall numbers to warming of the North Seawhich reduced stocks of the fishon which they feed. [ [http://news.bbc.co.uk/2/hi/uk_news/scotland/highlands_and_islands/6980265.stm BBC NEWS, Rise in divers mystifies experts] ]
* Hancock, Mark (2000): Artificial floating islands for nesting Black-throated Divers "Gavia arctica" in Scotland: construction, use and effect on breeding success. "Bird Study" 47: 165-175. [http://www.ingentaconnect.com/content/bto/bird/2000/00000047/00000002/472165 HTML abstract]
* Harrison, Peter (1988): "Seabirds" (2nd ed.). Christopher Helm, London ISBN 0-7470-1410-8
National Geographic Society(2002): "Field Guide to the Birds of North America". National Geographic, Washington DC. ISBN 0-7922-6877-6
* [http://ibc.hbw.com/ibc/phtml/especie.phtml?idEspecie=76 IBC] Videos on the Internet Bird Collection
* [http://www.flickr.com/search/groups/?w=42637302@N00&q=black-throated+diver&m=pool Flicker Field Guide Birds of the World] Photographs
* [http://blx1.bto.org/birdfacts/results/bob30.htm - BTO BirdFacts- Black-throated Diver]
The following articles deal with separation of Pacific Diver from Black-throated Diver:
* Birch, A. and Lee, C-T, 1997, Field identification of Arctic and Pacific Loons, "Birding" 29: 106-115.
* Birch, A and Lee, C-T, 1995, Identification of the Pacific Diver - a potential vagrant to Europe, "
Birding World" 8: 458-466.
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Black-throated Diver — juodakaklis naras statusas T sritis zoologija | vardynas atitikmenys: lot. Gavia arctica angl. Black throated Diver vok. Prachttaucher … Paukščių anatomijos terminai
black-throated diver — juodakaklis naras statusas T sritis zoologija | vardynas atitikmenys: lot. Gavia arctica angl. black throated diver vok. Prachttaucher, m rus. чернозобая гагара, f pranc. plongeon arctique, m ryšiai: platesnis terminas – narai … Paukščių pavadinimų žodynas
black-throated diver — noun Gavia arctica, a medium sized member of the loon or diver family that breeds in Eurasia, with grey head, black throat, white underparts and chequered black and white mantle. Syn: Arctic loon … Wiktionary
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