Great Northern Diver

From Academic Kids

(Redirected from Common loon)
Great Northern Diver/Common Loon
Missing image
Commonloonudfs.JPG



Scientific classification
Kingdom:Animalia
Phylum:Chordata
Class:Aves
Order:Gaviiformes
Family:Gaviidae
Genus:Gavia
Species:G. immer
Binomial name
Gavia immer
(Brunnich, 1764)

The Great Northern Diver, known in North America as the Common Loon (Gavia immer), is a large member of the loon, or diver, family. Adults are typically 73-88cm (28-36in) in length with a 122-148cm wingspan, slightly smaller than the similar White-billed Diver. Common Loons weigh between 2.7 and 6.3 kg with a mean value around 4.1 kg.

It breeds in Canada, parts of the northern United States, Greenland, and Alaska. There is a smaller population (ca. 3000 pairs) in Iceland. The female lays 2 eggs on a mound of vegetation very close to water. Both parents build the nest and feed the young.

It winters on sea coasts or on large lakes over a much wider range in Northern Europe and the British Isles as well as in North America.

Distinguishing identifiers: The only diver with head all black and a white necklace; black bill distinguishes it from the White-billed Diver.

Breeding adults have a black head, white underparts, and a chequered black-and-white mantle. Non-breeding plumage is drabber, with the chin and foreneck white. Its bill is grey or whitish and held horizontally.

It flies with its neck outstretched.

This species, like all divers, is a specialist fish-eater, catching its prey underwater, diving as deep as 200 feet. Freshwater diets consist of pike, perch, sunfish, trout and bass; salt water diets consist of rock cod, flounders, sea trout and herring.

The tremolo call, sometimes referred to as loon laughter, is an eerie wailing, a symbol of the Canadian wilderness, and often used as atmosphere in horror films.

Head of a Great Northern Diver
Enlarge
Head of a Great Northern Diver

This diver is well-known in Canada, appearing on the "loonie" coin, and is also the provincial bird of Ontario and the state bird of Minnesota. Native tribes of British Columbia believed that an excess of calls from this bird predicted rain, and even brought it.

Folk names include big loon, black-billed loon, call-up-a-storm, ember-goose, greenhead, guinea duck, imber diver, ring-necked loon, and walloon.

These birds have disappeared from some lakes in eastern North America due to the effects of acid rain and pollution. Artificial floating nesting platforms have been provided for loons in some lakes to reduce the impact of changing water levels due to dams and other human activities.

Gavia is Latin for "sea smew" (although divers are not Smew). The specific meaning of immer either is:

  1. related to Swedish immer and emmer, the gray or blackened ashes of a fire, referring to its dark plumage; or
  2. Latin immergo, to immerse, and immersus, submerged.

See also

External link

Template:Commons

de:Eistaucher fr:Plongeon huard it:Gavia immer nl:IJsduiker ja:ハシグロアビ pl:Nur lodowiec fi:Amerikanjkuikka zh:普通潜鸟

Navigation

Academic Kids Menu

  • Art and Cultures
    • Art (http://www.academickids.com/encyclopedia/index.php/Art)
    • Architecture (http://www.academickids.com/encyclopedia/index.php/Architecture)
    • Cultures (http://www.academickids.com/encyclopedia/index.php/Cultures)
    • Music (http://www.academickids.com/encyclopedia/index.php/Music)
    • Musical Instruments (http://academickids.com/encyclopedia/index.php/List_of_musical_instruments)
  • Biographies (http://www.academickids.com/encyclopedia/index.php/Biographies)
  • Clipart (http://www.academickids.com/encyclopedia/index.php/Clipart)
  • Geography (http://www.academickids.com/encyclopedia/index.php/Geography)
    • Countries of the World (http://www.academickids.com/encyclopedia/index.php/Countries)
    • Maps (http://www.academickids.com/encyclopedia/index.php/Maps)
    • Flags (http://www.academickids.com/encyclopedia/index.php/Flags)
    • Continents (http://www.academickids.com/encyclopedia/index.php/Continents)
  • History (http://www.academickids.com/encyclopedia/index.php/History)
    • Ancient Civilizations (http://www.academickids.com/encyclopedia/index.php/Ancient_Civilizations)
    • Industrial Revolution (http://www.academickids.com/encyclopedia/index.php/Industrial_Revolution)
    • Middle Ages (http://www.academickids.com/encyclopedia/index.php/Middle_Ages)
    • Prehistory (http://www.academickids.com/encyclopedia/index.php/Prehistory)
    • Renaissance (http://www.academickids.com/encyclopedia/index.php/Renaissance)
    • Timelines (http://www.academickids.com/encyclopedia/index.php/Timelines)
    • United States (http://www.academickids.com/encyclopedia/index.php/United_States)
    • Wars (http://www.academickids.com/encyclopedia/index.php/Wars)
    • World History (http://www.academickids.com/encyclopedia/index.php/History_of_the_world)
  • Human Body (http://www.academickids.com/encyclopedia/index.php/Human_Body)
  • Mathematics (http://www.academickids.com/encyclopedia/index.php/Mathematics)
  • Reference (http://www.academickids.com/encyclopedia/index.php/Reference)
  • Science (http://www.academickids.com/encyclopedia/index.php/Science)
    • Animals (http://www.academickids.com/encyclopedia/index.php/Animals)
    • Aviation (http://www.academickids.com/encyclopedia/index.php/Aviation)
    • Dinosaurs (http://www.academickids.com/encyclopedia/index.php/Dinosaurs)
    • Earth (http://www.academickids.com/encyclopedia/index.php/Earth)
    • Inventions (http://www.academickids.com/encyclopedia/index.php/Inventions)
    • Physical Science (http://www.academickids.com/encyclopedia/index.php/Physical_Science)
    • Plants (http://www.academickids.com/encyclopedia/index.php/Plants)
    • Scientists (http://www.academickids.com/encyclopedia/index.php/Scientists)
  • Social Studies (http://www.academickids.com/encyclopedia/index.php/Social_Studies)
    • Anthropology (http://www.academickids.com/encyclopedia/index.php/Anthropology)
    • Economics (http://www.academickids.com/encyclopedia/index.php/Economics)
    • Government (http://www.academickids.com/encyclopedia/index.php/Government)
    • Religion (http://www.academickids.com/encyclopedia/index.php/Religion)
    • Holidays (http://www.academickids.com/encyclopedia/index.php/Holidays)
  • Space and Astronomy
    • Solar System (http://www.academickids.com/encyclopedia/index.php/Solar_System)
    • Planets (http://www.academickids.com/encyclopedia/index.php/Planets)
  • Sports (http://www.academickids.com/encyclopedia/index.php/Sports)
  • Timelines (http://www.academickids.com/encyclopedia/index.php/Timelines)
  • Weather (http://www.academickids.com/encyclopedia/index.php/Weather)
  • US States (http://www.academickids.com/encyclopedia/index.php/US_States)

Information

  • Home Page (http://academickids.com/encyclopedia/index.php)
  • Contact Us (http://www.academickids.com/encyclopedia/index.php/Contactus)

  • Clip Art (http://classroomclipart.com)
Toolbox
Personal tools