|
Search over 100 encyclopedias and dictionaries: |
Research categories | Follow us on Twitter |
Research categories
View all topics in the newsView all reference sources at Encyclopedia.com |
|||
Alcidae
Alcidae (auks; class Aves, order Charadriiformes) A family of mainly black and white, small-winged, diving seabirds in which the legs are set well back, the feet are webbed, and bills vary from long and pointed to laterally compressed and high. Auks are mainly pelagic and gregarious, breeding in burrows or crevices, or on open cliff ledges, usually colonially. Brachyramphus marmoratus (marbled murrelet) breeds on forest branches. The two species of Fratercula (puffins) have distinctive yellow and red, large, laterally compressed bills during the breeding season; the horny bill plates and a horn-like structure around the eye are both shed in winter. Their feet are red with claws modified for digging burrows; they inhabit grassy island slopes and cliffs, breeding in rock crevices and burrows, and spending the rest of the year at sea. Auks feed on fish and invertebrates. There are 12–14 genera, and 22 species, found in northern regions of the Pacific and Atlantic, and in the Arctic.
|
|
|
Cite this article
MICHAEL ALLABY. "Alcidae." A Dictionary of Zoology. 1999. Encyclopedia.com. 30 May. 2012 <http://www.encyclopedia.com>. MICHAEL ALLABY. "Alcidae." A Dictionary of Zoology. 1999. Encyclopedia.com. (May 30, 2012). http://www.encyclopedia.com/doc/1O8-Alcidae.html MICHAEL ALLABY. "Alcidae." A Dictionary of Zoology. 1999. Retrieved May 30, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O8-Alcidae.html |
|
auks
auks are diving seabirds of the northern hemisphere which, like penguins, have their legs at the back of their bodies and on land stand upright and are clumsy movers. They use their wings for both flying and swimming. The great auk (Pinguinus impennis), which lost the power of flight, was a northern version of a penguin. It was driven to extinction by over-exploitation; the last recorded specimen was collected in 1844.
M. V. Angel |
|
|
Cite this article
"auks." The Oxford Companion to Ships and the Sea. 2006. Encyclopedia.com. 30 May. 2012 <http://www.encyclopedia.com>. "auks." The Oxford Companion to Ships and the Sea. 2006. Encyclopedia.com. (May 30, 2012). http://www.encyclopedia.com/doc/1O225-auks.html "auks." The Oxford Companion to Ships and the Sea. 2006. Retrieved May 30, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O225-auks.html |
|
auks
auks See ALCIDAE; CHARADRIIFORMES.
|
|
|
Cite this article
MICHAEL ALLABY. "auks." A Dictionary of Zoology. 1999. Encyclopedia.com. 30 May. 2012 <http://www.encyclopedia.com>. MICHAEL ALLABY. "auks." A Dictionary of Zoology. 1999. Encyclopedia.com. (May 30, 2012). http://www.encyclopedia.com/doc/1O8-auks.html MICHAEL ALLABY. "auks." A Dictionary of Zoology. 1999. Retrieved May 30, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O8-auks.html |
|