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Ferruginous Duck
The ferruginous duck (''Aythya nyroca''), also known as ferruginous pochard, common white-eye or white-eyed pochard, is a medium-sized diving duck from Eurosiberia. The scientific name is derived from the Ancient Greek word, (), an unknown seabird mentioned by authors including Hesychius and Aristotle, and the Russian word, (), the Russian word for pochard, which occurs in the bird's Russian common name. Description The breeding male is a rich, dark chestnut on the head, breast and flanks with contrasting pure white undertail coverts. In flight the white belly and underwing patch are visible. The females are duller and browner than the males. The male has a yellow eye and the females have a dark eye. Habitat The ferruginous duck prefers quite shallow fresh waterbodies with rich submerged and floating vegetation with dense stands of emergent vegetation on the margins. In some areas it will use saline or brackish pools or wetlands. On passage and wintering will also frequen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Johann Anton Güldenstädt
Johann Anton Güldenstädt (26 April 1745 in Riga, Latvia – 23 March 1781 in St. Petersburg, Russia) was a Baltic German natural history, naturalist and explorer in Russian service. Güldenstädt lost both his parents early, and from 1763 onwards studied pharmacy, botany and natural history in Berlin. At the age of 22, he obtained his doctorate in medicine at the Viadrina European University, University of Frankfurt in 1767. In the following year, he joined the Russian Academy of Sciences, Russian Imperial Academy of Sciences' expedition sent by Catherine II of Russia to explore the Russian empire's southern frontier. Güldenstädt travelled through Ukraine and the Astrakhan Oblast, Astrakhan region, as well as the northern Caucasus and Georgia (country), Georgia, both of which were almost entirely beyond the borders of the Russian empire. In March 1775 he returned to St Petersburg. The results of the expedition and Güldenstädt's edited expedition journal were published afte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aquatic Plants
Aquatic plants, also referred to as hydrophytes, are vascular plants and non-vascular plants that have adapted to live in aquatic environments ( saltwater or freshwater). In lakes, rivers and wetlands, aquatic vegetations provide cover for aquatic animals such as fish, amphibians and aquatic insects, create substrate for benthic invertebrates, produce oxygen via photosynthesis, and serve as food for some herbivorous wildlife. Familiar examples of aquatic plants include waterlily, lotus, duckweeds, mosquito fern, floating heart, water milfoils, mare's tail, water lettuce, water hyacinth, and algae. Aquatic plants require special adaptations for prolonged inundation in water, and for floating at the water surface. The most common adaptation is the presence of lightweight internal packing cells, aerenchyma, but floating leaves and finely dissected leaves are also common.Sculthorpe, C. D. 1967. The Biology of Aquatic Vascular Plants. Reprinted 1985 Edward Arnold, by London.Hu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Birds Of North Africa
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. There are over 11,000 living species and they are split into 44 Order (biology), orders. More than half are passerine or "perching" birds. Birds have Bird wing, wings 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 a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Birds Of The Middle East
Birds are a group of warm-blooded vertebrates constituting the class Aves (), characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweight skeleton. Birds live worldwide and range in size from the bee hummingbird to the common ostrich. There are over 11,000 living species and they are split into 44 orders. More than half are passerine or "perching" birds. Birds have wings 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 loss of flight in some birds, including ratites, penguins, and diverse endemic island species. The digestive and respiratory systems of birds are also uniquely adapted for flight. Some bird species of aquatic environments, particularly seabirds and some waterbirds, have furth ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aythya
''Aythya'' is a genus of diving ducks, with twelve species currently accepted. The genus was described in 1822 by the German zoologist Friedrich Boie, with the type species being greater scaup. The name ''Aythya'' comes from the Ancient Greek word (), which referred to an unknown diving-bird. The species are plump, compact, medium-sized ducks ranging from 37–61 cm long, 60–84 cm wingspan, and weighing 410–1600 g, with canvasback the largest, and ring-necked duck and ferruginous duck marginally the smallest. The body plumage is variably white, grey, red-brown, or black, often with a finely vermiculated pattern; in several species, the flanks are white or pale grey, the back darker grey to black, and the breast and tail black. The heads are strongly coloured in the males, orange-red in some species, and black with a green to purple sheen ( structural colour) in good light; the sheen colour varies with both species and angle of light incidence – in for exa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Birdwatch (magazine)
''Birdwatch'' (ISSN 0967-1870) is a British monthly magazine for birdwatchers, established in 1992 by Solo Publishing. It is distributed by subscription The subscription business model is a business model in which a customer must pay a recurring price at regular intervals for access to a product or service. The model was pioneered by publishers of books and periodicals in the 17th century. It ..., through newsagents and electronically. Key content areas include bird identification, site guides, skills development, recent sightings and news and reviews. The circulation is around 13,000. Solo Publishing was acquired by Warners Group Publications plc in 2008. References External linksWebsiteat BirdGuides.com Journals and magazines relating to birding and ornithology Ornithology in the United Kingdom Hobby magazines published in the United Kingdom Monthly magazines published in the United Kingdom Wildlife magazines 1992 establishments in the United Kingdom ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
British Birds (magazine)
''British Birds'' is a monthly ornithology magazine that was established in 1907. It is now published by BB 2000 Ltd, which is wholly owned by The British Birds Charitable Trust (registered charity number 1089422), established for the benefit of British ornithology. Its circulation in 2000 was 5,250 copies; its circulation peaked at 11,000 in the late 1980s. The current editor is Stephen Menzie. ''British Birds'' is aimed at serious birdwatchers and ornithologists, rather than the more casual birdwatchers catered for by some other magazines on the subject. It publishes the findings of the British Birds Rarities Committee. Its mascot, and later logo, the red grouse, was chosen because at the time it was then considered an endemic British species; though subsequently long considered a subspecies of the willow grouse, further study resulted in it being returned to separate species status in 2024. In 1916, ''British Birds'' magazine absorbed ''The Zoologist'', due to the latter's ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Forktail (journal)
''Forktail'' is the annual peer-reviewed journal of the Oriental Bird Club. It is the principal ornithological journal dedicated to the Oriental region and publishes manuscripts in English, treating any aspect of its ornithology (e.g., distribution, biology, conservation, ecology, taxonomy and evolution). Forktail's geographic scope is bounded by the Indus River to the west; the Russian Far East, Korean Peninsula, Japan, and Lydekker's Line (i.e. the eastern boundary of Wallacea) to the east, and the Chagos Archipelago, Lesser Sundas, Christmas Island and Cocos (Keeling) Islands to the south. As of 2020, Frank E. Rheindt is its Managing Editor, assisted by Yong Ding Li. Each issue is A4 in size, with an emerald green cover. Important papers published in ''Forktail'' include descriptions of three new bird species: the Bukidnon woodcock in 2001, the Calayan rail in 2004, and the Cambodian tailorbird in 2013. The Oriental Bird Club also publishes another periodical, a twic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Museum Wiesbaden
The Museum Wiesbaden is a two-branch museum of Art museum, art and Natural history museum, natural history in the Hesse, Hessian capital of Wiesbaden, Germany. It is one of the three Hessian State museums, in addition to the museums in Hessian State Museum, Kassel, Kassel and Hessisches Landesmuseum Darmstadt, Darmstadt. History The foundation of the originally three museums traces back to the citizens of the city and to Johann Wolfgang von Goethe, who stayed in Wiesbaden in 1814/1815. In 1825 he persuaded the Frankfurt am Main, Frankfurter private collector Johann Isaac Gerning and Johann Christian Gerning to donate their extensive collections of works of art and antiquities to the Duchy of Nassau in return for the payment of an annuity for life. Under the responsibility of the newly founded associations, but controlled by the ducal government, the citizens of Wiesbaden and the region were able to quickly expand these collections. Together with the pieces of the ("Associat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AEWA
The Agreement on the Conservation of African-Eurasian Migratory Waterbirds, or African-Eurasian Waterbird Agreement (AEWA), is an independent international treaty developed under the auspices of the United Nations Environment Programme's Convention on Migratory Species. Background The Agreement on the Conservation of African-Eurasian Migratory Waterbirds was drafted on 19 June 1995 in The Hague, Netherlands, in order to coordinate efforts to conserve bird species migrating between European and African nations. Description The AEWA is an independent treaty under the auspices of the Convention on Migratory Species, of the United Nations Environment Programme. The agreement focuses on bird species that depend on wetlands for at least part of their lifecycle and cross international borders in their migration patterns. As of 2023 it covered 255 species. As of July 2023, its scope covered territories in 119 Range States stretching from the Arctic to South Africa, encompassing the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
