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Razorbill
The razorbill (''Alca torda'') is a North Atlantic colonial seabird and the only extant member of the genus ''Alca (bird), Alca'' of the family Alcidae, the auks. It is the closest living relative of the extinct great auk (''Pinguinus impennis''). Historically, it has also been known as "auk", "razor-billed auk" and "lesser auk". Razorbills are primarily black with a white underside. The male and female are identical in plumage; however, males are generally larger than females. This agile bird, which is capable of both flight and diving, has a predominantly aquatic lifestyle and only comes to land in order to breed. It is Monogamy in animals, monogamous, choosing one partner for life. Females lay one egg per year. Razorbills nest along coastal cliffs in enclosed or slightly exposed crevices. The parents spend equal amounts of time incubating, and once the chick has hatched, they take turns foraging for their young. Presently, this species faces major threats, including the dest ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Razorbills And Puffins
The razorbill (''Alca torda'') is a North Atlantic colonial seabird and the only extant member of the genus '' Alca'' of the family Alcidae, the auks. It is the closest living relative of the extinct great auk (''Pinguinus impennis''). Historically, it has also been known as "auk", "razor-billed auk" and "lesser auk". Razorbills are primarily black with a white underside. The male and female are identical in plumage; however, males are generally larger than females. This agile bird, which is capable of both flight and diving, has a predominantly aquatic lifestyle and only comes to land in order to breed. It is monogamous, choosing one partner for life. Females lay one egg per year. Razorbills nest along coastal cliffs in enclosed or slightly exposed crevices. The parents spend equal amounts of time incubating, and once the chick has hatched, they take turns foraging for their young. Presently, this species faces major threats, including the destruction of breeding sites, oil sp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Great Auk
The great auk (''Pinguinus impennis''), also known as the penguin or garefowl, is an Extinction, extinct species of flightless bird, flightless auk, alcid that first appeared around 400,000 years ago and Bird extinction, became extinct in the mid-19th century. It was the only modern species in the genus ''Pinguinus''. It was not closely related to the Penguin, penguins of the Southern Hemisphere, which were named for their resemblance to this species. It bred on rocky, remote islands with easy access to the ocean and a plentiful food supply, a rarity in nature that provided only a few breeding sites for the great auks. During the non-breeding season, the auk foraged in the waters of the North Atlantic, ranging as far south as northern Spain and along the coastlines of Canada, Greenland, Iceland, the Faroe Islands, Norway, Ireland, and Great Britain. The bird was tall and weighed about , making it the largest alcid to survive into the modern era, and the second-largest member ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Common Murre
The common murre or common guillemot (''Uria aalge'') is a large auk. It has a Subarctic, circumpolar distribution, occurring in low-Arctic and boreal waters in the North Atlantic and North Pacific. It spends most of its time at sea, only coming to land to breed on rocky cliff shores or islands. Common murres are fast in direct flight but are not very agile. They are highly mobile underwater using their wings to 'fly' through the water column, where they typically dive to depths of . Depths of up to have been recorded. Common murres breed in Bird colony, colonies at high densities. Nesting pairs may be in bodily contact with their neighbours. They make no nest; their single egg is Avian incubation, incubated between the adult's feet on a bare rock ledge on a cliff face. Eggs hatch after ~30 days incubation. The chick is born Down feather, downy and can regulate its body temperature after 10 days. Some 20 days after hatching, the chick leaves its nesting ledge and heads for the s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alcidae
Auks or alcids are birds of the family Alcidae in the order Charadriiformes. The alcid family includes the murres, guillemots, auklets, puffins, and murrelets. The family contains 25 extant or recently extinct species that are divided into 11 genera. Auks are found throughout the Northern Hemisphere. Apart from the extinct great auk, all auks can fly, and are excellent swimmers and divers (appearing to "fly" in water), but their walking appears clumsy. Names Several species have different English names in Europe and North America. The two species known as "murres" in North America are called "guillemots" in Europe, and the species called little auk in Europe is referred to as dovekie in North America. Etymology The word "auk" is derived from Icelandic ''álka'' and Norwegian ''alka'' or ''alke'' from Old Norse ''ālka'' from Proto-Germanic *''alkǭ'' (sea-bird, auk). Taxonomy The family name Alcidae comes from the genus '' Alca'' given by Carl Linnaeus in 1758 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stora Karlsö
Stora Karlsö is a small Swedish island in the Baltic Sea, situated about west of the island of Gotland and part of Eksta socken. Environment Stora Karlsö has an area of about . It is mainly a limestone plateau, up to in height, bordered by steep cliffs along the shore. It is mostly covered with alvar. It is a nature reserve, the second oldest in the world after Yellowstone National Park. Flora and fauna The island is mostly known for its rich flora and birdlife. There are many juniper bushes and some small groves of deciduous trees. In spring, there is an extraordinary number of orchids, mostly elder-flowered orchid and early purple orchid. There are also several very rare plants for Sweden such as '' Adonis vernalis'', '' Lactuca quercina'' (called ''Karlsösallat'' in Swedish), hart's-tongue fern and '' Corydalis gotlandica'' (the only endemic plant of Gotland). Stora Karlsö also has large colonies of common guillemots (about 15,700 breeding pairs) and razorbills (1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atlantic Puffin
The Atlantic puffin ('), also known as the common puffin, is a species of seabird in the auk family (biology), family. It is the only puffin native to the Atlantic Ocean; two related species, the tufted puffin and the horned puffin being found in the northeastern Pacific. The Atlantic puffin breeds in Russia, Iceland, Ireland, Great Britain, Britain, Norway, Greenland, Newfoundland and Labrador, Nova Scotia, and the Faroe Islands, and as far south as Maine in the west and France in the east. It is most commonly found in the Westman Islands, Iceland. Although it has a large population and a wide range, the species has declined rapidly, at least in parts of its range, resulting in it being rated as Vulnerable species, vulnerable by the IUCN. On land, it has the typical upright stance of an auk. At sea, it swims on the surface and feeds on zooplankton, small fish, and crabs, which it catches by diving underwater, using its wings for propulsion. This puffin has a black crown and bac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alca (bird)
''Alca'' is a genus of charadriiform bird that contains a single extant species, the razorbill ''(Alca torda)''. Many fossil species are known, the oldest dating back to the Miocene. The genus appears to have always been restricted to the North Atlantic The Atlantic Ocean is the second largest of the world's five oceanic divisions, with an area of about . It covers approximately 17% of Earth's surface and about 24% of its water surface area. During the Age of Discovery, it was known for .... References {{Taxonbar, from=Q3608921 Bird genera Bird genera with one living species Alcini Auks ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seabird
Seabirds (also known as marine birds) are birds that are adaptation, adapted to life within the marine ecosystem, marine environment. While seabirds vary greatly in lifestyle, behaviour and physiology, they often exhibit striking convergent evolution, as the same environmental problems and feeding ecological niche, niches have resulted in similar adaptations. The first seabirds evolved in the Cretaceous geological period, period, while modern seabird families emerged in the Paleogene. Seabirds generally live longer, Reproduction, breed later and have fewer young than other birds, but they invest a great deal of time in their young. Most species nest in Bird colony, colonies, varying in size from a few dozen birds to millions. Many species are famous for undertaking long annual bird migration, migrations, crossing the equator or circumnavigating the Earth in some cases. They feed both at the ocean's surface and below it, and even on each other. Seabirds can be highly pelagic, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monogamy In Animals
Some animal species have a monogamous mating system, in which pairs bond to raise offspring. This is associated, usually implicitly, with sexual monogamy. Monogamous mating Monogamy is defined as a pair bond between two adult animals of the same species. This pair may cohabitate in an area or territory for some duration of time, and in some cases may copulate and reproduce with only each other. Monogamy may either be short-term, lasting one to a few seasons or long-term, lasting many seasons and in extreme cases, life-long. Monogamy can be partitioned into two categories, social monogamy and genetic monogamy which may occur together in some combination, or completely independently of one another.Ophir, Alexander G., Phelps, Steven M., Sorin, Anna Bess & O. Wolff, J. (2008)Social but not genetic monogamy is associated with greater breeding success in prairie voles/ref> As an example, in the cichlid species '' Variabilichromis moorii'', a monogamous pair will care for eggs and y ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
