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Chubut Steamer Duck
The Chubut steamer duck or white-headed flightless steamer duck (''Tachyeres leucocephalus'') is a flightless duck endemic to Argentina. It is the most recently recognized species of steamer duck, being described only in 1981. This is because it is only found along a rather small and sparsely populated stretch of coast around the Golfo San Jorge in southern Chubut and northern Santa Cruz Provinces, and because steamer ducks in general look fairly similar in plumage. Description Adult male Chubut steamer ducks have white heads with a bright yellow/orange bill with a black nail. Their webs and feet are yellow/orange with black claws. The rest of their plumage includes mostly grey bodies and white bellies. While the male is molting his bill turns to a duller yellow/orange. Adult female Chubut steamer ducks have brown heads and necks with small white line going from the back of the eye to the fore-neck. Their bills have a greenish/yellow color. The Adult female Chubut steamer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Philip Strong Humphrey
Philip Strong Humphrey (26 February 1926, Hibbing, Minnesota – 13 November 2009, Lawrence, Kansas) was an ornithologist, museum curator, and professor of zoology. Philip S. Humphrey grew up in Litchfield, Connecticut and from an early age was interested in birds. In Litchfield, Duryea Morton (1924–2019) was a childhood friend who encouraged Humphrey's ornithological interests. After graduating from Litchfield's Forman School, Humphrey matriculated at Amherst College and graduated there in 1949 after serving in the U.S. Army Air Forces from 1944 to 1947. He then attended the University of Michigan, where he received in 1955 his Ph.D. in zoology. His doctoral thesis was "on the anatomy and systematic biology of the sea-ducks (''Mergini'')." For the two academic years 1955–1956 and 1956–1957 he worked in the University of Michigan's Museum of Zoology. From 1957 to 1962 at Yale University, Humphrey was an assistant professor of zoology, as well as an assistant curator of orn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Balanus Glandula
''Balanus glandula'' (North American Acorn Barnacle, Common Acorn Barnacle) is one of the most common barnacle species on the Pacific coast of North America, distributed from the U.S. state of Alaska to Bahía de San Quintín near San Quintín, Baja California. They are commonly found in the upper intertidal zone on mussels, rocks and pier pilings. They can obtain oxygen from both water and air. This acorn barnacle is a moderate-sized one with a diameter of up to . The shell is formed by overlapping plates and has a calcareous basis. It has more the shape of a cylinder than the shape of a cone. The white operculum has heavily ridged walls. It can live up to ten years. It has been intensely studied in recent years as a model species for linking physical oceanography and population genetics (or phylogeography) surveys. This species was introduced to the shores of Argentina in the 1960s, and has become an invasive species An invasive species otherwise known as an alien is a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endemic Birds Of Argentina
Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsewhere. For example, the Cape sugarbird is found exclusively in southwestern South Africa and is therefore said to be ''endemic'' to that particular part of the world. An endemic species can be also be referred to as an ''endemism'' or in scientific literature as an ''endemite''. For example '' Cytisus aeolicus'' is an endemite of the Italian flora. '' Adzharia renschi'' was once believed to be an endemite of the Caucasus, but it was later discovered to be a non-indigenous species from South America belonging to a different genus. The extreme opposite of an endemic species is one with a cosmopolitan distribution, having a global or widespread range. A rare alternative term for a species that is endemic is "precinctive", which applies to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Birds Of Patagonia
Birds are a group of warm-blooded vertebrates constituting the class (biology), class Aves (), characterised by feathers, toothless beaked jaws, the Oviparity, laying of Eggshell, hard-shelled eggs, a high Metabolism, metabolic rate, a four-chambered heart, and a strong yet lightweight Bird skeleton, skeleton. Birds live worldwide and range in size from the bee hummingbird to the Common ostrich, ostrich. There are about ten thousand living species, more than half of which are passerine, or "perching" birds. Birds have whose development varies according to species; the only known groups without wings are the extinct moa and elephant birds. Wings, which are modified forelimbs, gave birds the ability to fly, although further evolution has led to the Flightless bird, loss of flight in some birds, including ratites, penguins, and diverse endemism, endemic island species. The digestive and respiratory systems of birds are also uniquely adapted for flight. Some bird species of a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tachyeres
The steamer ducks are a genus (''Tachyeres'') of ducks in the family Anatidae. All of the four species occur at the southern cone of South America in Chile and Argentina, and all except the flying steamer duck are flightless; even this one species capable of flight rarely takes to the air. They can be aggressive and are capable of chasing off predators like petrels. Bloody battles of steamer ducks with each other over territory disputes are observed in nature. They even kill waterbirds that are several times their size. Taxonomy The genus ''Tachyeres'' was introduced in 1875 by the English zoologist Richard Owen to accommodate the Falkland steamer duck. The genus name ''Tachyeres'', "having fast oars" or "fast rower", comes from Ancient Greek ταχυ- "fast" + ἐρέσσω "I row (as with oars)". The common name "steamer ducks" arose because, when swimming fast, they flap their wings into the water as well as using their feet, creating an effect like a paddle steamer. They ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
UNESCO Biosphere Reserve
Man and the Biosphere Programme (MAB) is an intergovernmental scientific program, launched in 1971 by UNESCO, that aims to establish a scientific basis for the improvement of relationships between people and their environments. MAB's work engages fully with the international development agenda—specially with the Sustainable Development Goals and the Post 2015 Development Agenda—and addresses challenges linked to scientific, environmental, societal and development issues in diverse ecosystems; from mountain regions to marine, coastal and island areas; from tropical forests to dry lands and urban areas. MAB combines the natural and social sciences, economics and education to improve human livelihoods and the equitable sharing of benefits, and to safeguard natural and managed ecosystems, thus promoting innovative approaches to economic development that are socially and culturally appropriate, and environmentally sustainable. The MAB program provides a unique platform fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
San Jorge Gulf
The San Jorge Gulf (Golfo San Jorge; Spanish for ''Gulf of St. George'') is a bay in southern Patagonia, Argentina. It is an ocean basin opening to the Atlantic. Its shoreline spans Chubut and Santa Cruz province. The gulf measures approximately at its mouth and covers approximately . It is located between Cape Dos Bahías and Cape Tres Puntas. Due to its geography, more than 70% of the gulf's basin is between and deep. To the south it is about deep and in the north . The seabed was formed by bivalves and cirripedial remains, and it consists of mud, sand, gravel, and sand with carbonate. The mean water temperature varies between and ; salinity is around 33000 ppm. Population centers Approximately 90% of Chubut Province's inhabitants live on the coast of the gulf. Comodoro Rivadavia and Caleta Olivia are two larger cities along the coast. Each having ports with oil buoys and fishing facilities. The fishing towns of Camarones and the seaside resort Rada Tilly also lie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crested Caracara
The crested caracara (''Caracara plancus'') is a bird of prey in the family Falconidae. It is found from the southern United States through Central and South America to Tierra del Fuego. It was formerly placed in the genus ''Polyborus''. Description The crested caracara has a total length of and a wingspan of . Its weight is , averaging in seven birds from Tierra del Fuego.''CRC Handbook of Avian Body Masses, 2nd Edition'' by John B. Dunning Jr. (Editor). CRC Press (2008), . Individuals from the colder southern part of its range average larger than those from tropical regions (as predicted by Bergmann's rule) and are the largest type of caracara. In fact, they are the second-largest species of falcon in the world by mean body mass, second only to the gyrfalcon. The cap, belly, thighs, most of the wings, and tail tip are dark brownish, the auriculars (feathers surrounding the ear), throat, and nape are whitish-buff, and the chest, neck, mantle, back, upper tail coverts, cris ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kelp Gull
The kelp gull (''Larus dominicanus''), also known as the Dominican gull, is a gull that breeds on coasts and islands through much of the Southern Hemisphere. The nominate ''L. d. dominicanus'' is the subspecies found around South America, parts of Australia (where it overlaps with the Pacific gull), and New Zealand (where it is known as the black-backed gull, the southern black-backed gull, mollyhawk – particularly the juveniles, or by its Māori name ''karoro''). ''L. d. vetula'' (known as the Cape gull) is a subspecies occurring around Southern Africa. The specific name comes from the Dominican Order of friars, who wear black and white habits. Description The kelp gull superficially resembles two gulls from further north in the Atlantic Ocean, the lesser black-backed gull and the great black-backed gull and is intermediate in size between these two species. This species ranges from in total length, from in wingspan and from in weight. Adult males and females weigh on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Killer Whale
The orca or killer whale (''Orcinus orca'') is a toothed whale belonging to the oceanic dolphin family, of which it is the largest member. It is the only extant species in the genus ''Orcinus'' and is recognizable by its black-and-white patterned body. A cosmopolitan species, orcas can be found in all of the world's oceans in a variety of marine environments, from Arctic and Antarctic regions to tropical seas. Orcas have a diverse diet, although individual populations often specialize in particular types of prey. Some feed exclusively on fish, while others hunt marine mammals such as seals and other species of dolphin. They have been known to attack baleen whale calves, and even adult whales. Orcas are apex predators, as they have no natural predators. They are highly social; some populations are composed of very stable matrilineal family groups (pods) which are the most stable of any animal species. Their sophisticated hunting techniques and vocal behaviours, which a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South American Sea Lion
The South American sea lion (''Otaria flavescens'', formerly ''Otaria byronia''), also called the southern sea lion and the Patagonian sea lion, is a sea lion found on the western and southeastern coasts of South America. It is the only member of the genus ''Otaria''. The species is highly sexually dimorphic. Males have a large head and prominent mane. They mainly feed on fish and cephalopods and haul out on sand, gravel, rocky, or pebble beaches. In most populations, breeding males are both territorial and harem holding; they establish territories first and then try to herd females into them. The overall population of the species is considered stable, estimated at 265,000 animals. Naming The South American sea lion was classified as ''Otaria flavescens'' by George Shaw in 1800 and as ''Otaria byronia'' by Henri Marie Ducrotay de Blainville in 1820. The two nomenclatures were historically used interchangeably, but ''O. flavescens'' has become the preferred name. The speci ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wakame
Wakame ''(Undaria pinnatifida)'' is a species of kelp native to cold, temperate coasts of the northwest Pacific Ocean. As an edible seaweed, it has a subtly sweet, but distinctive and strong flavour and texture. It is most often served in soups and salads. Wakame has long been collected for food in East Asia, and sea farmers in Japan have cultivated wakame since the eighth century (Nara period). , the Invasive Species Specialist Group has listed the species on its list of 100 worst globally invasive species. Names The primary common name is derived from the Japanese name (, , , ). *In English, it can be also called ''sea mustard''. *In China, it is called ( 裙带菜). *In French, it is called or ('sea fern'). *In Korea, it is called (미역). Etymology In Old Japanese, stood for edible seaweeds in general as opposed to standing for algae. In kanji, such as , and were applied to transcribe the word.小学館国語辞典編集部 (ed.) (2006), 『日本国語大辞典 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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