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Gavia immer

(lesser black-billed loon)

Overview

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Interesting Facts

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Common Names

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Click on the language to view common names.

Common Names in Albanian:

Nori Polar

Common Names in Asturian:

Cal

Common Names in Basque:

Aliota Handia

Common Names in Breton:

Ar Splujer Bras

Common Names in Catalan:

Cal

Common Names in Czech:

Pot

Common Names in Danish:

Islom

Common Names in Dutch:

IJsduiker

Common Names in English:

American Common Loon, big loon, black-billed loon, calling-up-a-storm, Common Loon, ember-goose, Great Northern Diver, Great Northern Loon, greenhead, guinea duck, imber diver, lesser black-billed loon, ring-necked loon, walloon

Common Names in Esperanto:

Granda Kolimbo

Common Names in Estonian:

J

Common Names in Faroese:

Havg

Common Names in Finnish:

Amerikanj

Common Names in French:

Huart , plongeon huard, Plongeon imbrin

Common Names in Gaelic, Irish:

Bun-Bhuachaille

Common Names in Galician:

Cal

Common Names in German:

Eistaucher

Common Names in Hungarian:

Jeges B

Common Names in Icelandic:

Himbrimi

Common Names in Inuktitut:

Tudlik

Common Names in Irish:

L

Common Names in Italian:

Strolaga maggiore

Common Names in Japanese:

Hashiguroabi, ハシグロアビ

Common Names in Latin:

Gavia imber

Common Names in Latvian:

Polara Gargale

Common Names in Lithuanian:

Ledinis Naras

Common Names in Manx:

Arrag Vooar

Common Names in Norwegian:

Islom

Common Names in Polish:

(Nur) Lodowiec, Lodowiec

Common Names in Portuguese:

Mob

Common Names in Romansh:

Sfunsella Da Glatsch

Common Names in Russian:

Полярная гагара

Common Names in Serbian:

Morski Gnjurac Veliki

Common Names in Slovak:

Pot

Common Names in Slovenian:

Ledni Slapnik

Common Names in Spanish:

Colimbo, Colimbo Grande, Colimbo mayor

Common Names in Spanish (Cuba):

Somormujo

Common Names in Spanish (Mexico):

Colimbo Com

Common Names in Swedish:

Islom, Svartn, Svartnäbbad islom

Common Names in Turkish:

Buz Dalgici

Common Names in Welsh:

Trochydd Mawr

Description

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Physical Description

Adult : Head : glossy black with greenish sheen Face : Eye Color: red-brown Bill: black Curvature: straight Shape : stout Body: Back: checkered black and white.

Color:

Adult alternate: Black bill · Black head · Black neck with white markings · White chest and belly · Black back with white checkering and spotting

Adult basic: Pale gray bill · Gray-brown cap, forehead, nape, hindneck and back · White face , eye ring, chin, throat , foreneck and belly · Jagged border between white foreneck and dark hindneck

Immature : Like basic-plumaged adult but often with paler bill and white scalloping on back

Size/Age/Growth

About 28 to 36 inches long, with a wingspan of 50 to 58 inches. Adults weigh about 145.6 ounces .

Habitat

Vegetation: freshwater marshes, coastal waters • Sensitivity to Disturbance: Medium

Typically found at an altitude of 0 to 3,869 meters (0 to 12,694 feet).[1]

Ecology: Behaviour This species is strongly migratory, with inland breeding populations moving south or to the coast after breeding1. The species breeds from May onwards in isolated solitary pairs, nesting later further to the north depending on the timing of the thaw1. Adults become flightless for a short time in late-winter when they moult their flight feathers3. During the winter the species occurs singly, in pairs or in small loose flocks in marine habitats2, 3, occasionally also forming large congregations of c.3001, 3. Habitat Breeding The species breeds on large, deep freshwater lakes in coniferous forest or on open tundra1, requiring clear water with visibilities of at least 3-4 m and small islands (less than 2.5 ha) for nesting7. Non-breeding It winters along the coast on exposed rocky shores , sheltered bays1, channels and sheltered inlets2 showing a preference for shallow inshore waters7. It may also be found inland1 on lakes and reservoirs during this season2, although this is largely influenced by the weather7. Diet Its diet consists predominantly of fish as well as crustaceans, molluscs , aquatic insects, annelid worms, frogs , other amphibians and plant matter (e.g. Potamogeton spp. , willow Salix spp. shoots , roots , seeds, moss and algae)1. Breeding site The nest is a mound of plant matter screened by vegetation2 and placed near the water's edge1 on islands, islets or promontories2. Management information There is evidence that introducing floating nesting platforms on lakes is successful in increasing the reproductive success of the species5, 7, and that nest losses caused by flooding can be reduced by controlling water levels during the nesting period7. Mortality from entanglement and drowning in fishing nets could also be reduced by using fish traps with openings at the top to allow birds to escape , or by checking traps more regularly for captured birds7.

[2].

List of Habitats :

Biology

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Diet

Primarily:

Fish

Lesser Quantities of: Aquatic Invertebrates

Reproduction

Migration

migratory

Taxonomy

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Synonyms

Gavia immer (Brunnich, 1764) • Gavia immer (Brnnich, 1764)

Notes

Name Status: Accepted Name .

Last scrutiny: 13-Jun-2007

Similar Species

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Yellow-Billed Loon

Members of the genus Gavia

ZipcodeZoo has pages for 11 species and subspecies in this genus:

G. adamsii (White-Billed Northern Diver) · G. arctica (Green-Throated Black-Billed Loon) · G. arctica arctica (Arctic Loon) · G. arctica pacifica (Arctic Loon) · G. arctica viridigularis (Arctic Loon) · G. immer (Lesser Black-Billed Loon) · G. immer elasson (Lesser Black-Billed Loon) · G. immer immer (Lesser Black-Billed Loon) · G. pacifica (Pacific Diver) · G. stellata (Pepper-Shinned Loon) · G. stellata stellata (Pepper-Shinned Loon)

More Info

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Further Reading

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Notes

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Contributors

Data Sources

Accessed through GBIF Data Portal November 12, 2007:

Identifiers

Footnotes

  1. Mean = 255.120 meters (837.008 feet), Standard Deviation = 528.570 based on 7,517 observations. Altitude information for each observation from British Oceanographic Data Centre. [back]
  2. BirdLife International 2009. Gavia immer. In: IUCN 2011. IUCN Red List of Threatened Species. Version 2011.2. <www.iucnredlist.org>. Downloaded on 01 February 2012. [back]
Last Revised: 2012-04-30