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White Woodpecker
The white woodpecker (''Melanerpes candidus'') is a South American species of woodpecker (family Picidae) native to the wooded grasslands of Suriname, French Guiana, Brazil, Bolivia, Paraguay, Uruguay and Argentina. It is a bright white bird with black wings and a distinctive small bright yellow eye patch. The IUCN has rated it as a "least-concern species". Taxonomy The species was first described as ''Melanerpes candidus'' in 1796 by the French naturalist Bernhard Christian Otto, the type locality being Cayenne. It is sometimes placed in its own genus ''Leuconerpes'', but shows many similarities in morphology to ''Melanerpes''. No subspecies are known (monotypic). Description This woodpecker grows to a length of and weighs around , with a range of . It is one of the largest ''Melanerpes'' woodpeckers along with the Jamaican woodpecker and Lewis' woodpecker. The mantle, back, wings and tail of the adult are black, the flight feathers being brownish-black above and the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bernhard Christian Otto
Bernhard Christian Otto (6 March 1745 – 5 November 1835) was a German doctor, professor of medicine, naturalist and economist. Otto was born in Niepars near Stralsund to Pastor Gotthard Joachim Jacob Otto of Niepars and his wife Agnese Regina, daughter of Pastor Dionisius Casper Droysen (died 1765) of Dersekow. He studied medicine at the University of Göttingen and received a doctorate in 1771. In 1772 he became a teacher at the Greifswald medical faculty where he gave lectures in surgery and delivery for midwives and surgeons. From 1776 he also offered lectures in natural history and became a professor of natural history and economics in 1781, while also managing the botanical garden. He also served as rector at the University of Greifswald before moving to Frankfurt (Oder), Frankfurt as a professor of medicine at the European University Viadrina, Alma Mater Viadrina in 1788. In 1792 he took up the position vacated upon the death of professor Peter Immanuel Hartmann. He retired ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Morphology (biology)
Morphology is a branch of biology dealing with the study of the form and structure of organisms and their specific structural features. This includes aspects of the outward appearance (shape, structure, colour, pattern, size), i.e. external morphology (or eidonomy), as well as the form and structure of the internal parts like bones and organs, i.e. internal morphology (or anatomy). This is in contrast to physiology, which deals primarily with function. Morphology is a branch of life science dealing with the study of gross structure of an organism or taxon and its component parts. History The etymology of the word "morphology" is from the Ancient Greek (), meaning "form", and (), meaning "word, study, research". While the concept of form in biology, opposed to function, dates back to Aristotle (see Aristotle's biology), the field of morphology was developed by Johann Wolfgang von Goethe (1790) and independently by the German anatomist and physiologist Karl Friedrich Burdach ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Birds Of Bolivia
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 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 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 further evolved for swimming. Birds ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Birds Of Argentina
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 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 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 further evolved for swimming. Bird ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Least-concern Species
A least-concern species is a species that has been categorized by the International Union for Conservation of Nature (IUCN) as evaluated as not being a focus of species conservation because the specific species is still plentiful in the wild. They do not qualify as threatened, near threatened, or (before 2001) conservation dependent. Species cannot be assigned the "Least Concern" category unless they have had their population status evaluated. That is, adequate information is needed to make a direct, or indirect, assessment of its risk of extinction based on its distribution or population status. Evaluation Since 2001 the category has had the abbreviation "LC", following the IUCN 2001 Categories & Criteria (version 3.1). Before 2001 "least concern" was a subcategory of the "Lower Risk" category and assigned the code "LR/lc" or lc. Around 20% of least concern taxa (3261 of 15636) in the IUCN database still use the code "LR/lc", which indicates they have not been re-evaluate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Union For Conservation Of Nature
The International Union for Conservation of Nature (IUCN; officially International Union for Conservation of Nature and Natural Resources) is an international organization working in the field of nature conservation and sustainable use of natural resources. It is involved in data gathering and analysis, research, field projects, advocacy, and education. IUCN's mission is to "influence, encourage and assist societies throughout the world to conserve nature and to ensure that any use of natural resources is equitable and ecologically sustainable". Over the past decades, IUCN has widened its focus beyond conservation ecology and now incorporates issues related to sustainable development in its projects. IUCN does not itself aim to mobilize the public in support of nature conservation. It tries to influence the actions of governments, business and other stakeholders by providing information and advice and through building partnerships. The organization is best known to the wider pu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Biological Dispersal
Biological dispersal refers to both the movement of individuals (animals, plants, fungi, bacteria, etc.) from their birth site to their breeding site ('natal dispersal'), as well as the movement from one breeding site to another ('breeding dispersal'). Dispersal is also used to describe the movement of propagules such as seeds and spores. Technically, dispersal is defined as any movement that has the potential to lead to gene flow. The act of dispersal involves three phases: departure, transfer, settlement and there are different fitness costs and benefits associated with each of these phases. Through simply moving from one habitat patch to another, the dispersal of an individual has consequences not only for individual fitness, but also for population dynamics, population genetics, and species distribution. Understanding dispersal and the consequences both for evolutionary strategies at a species level, and for processes at an ecosystem level, requires understanding on th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bird Migration
Bird migration is the regular seasonal movement, often north and south along a flyway, between breeding and wintering grounds. Many species of bird migrate. Migration carries high costs in predation and mortality, including from hunting by humans, and is driven primarily by the availability of food. It occurs mainly in the northern hemisphere, where birds are funneled onto specific routes by natural barriers such as the Mediterranean Sea or the Caribbean Sea. Migration of species such as storks, turtle doves, and swallows was recorded as many as 3,000 years ago by Ancient Greek authors, including Homer and Aristotle, and in the Book of Job. More recently, Johannes Leche began recording dates of arrivals of spring migrants in Finland in 1749, and modern scientific studies have used techniques including bird ringing and satellite tracking to trace migrants. Threats to migratory birds have grown with habitat destruction, especially of stopover and wintering sites, as wel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Andes
The Andes, Andes Mountains or Andean Mountains (; ) are the longest continental mountain range in the world, forming a continuous highland along the western edge of South America. The range is long, wide (widest between 18°S – 20°S latitude), and has an average height of about . The Andes extend from north to south through seven South American countries: Venezuela, Colombia, Ecuador, Peru, Bolivia, Chile, and Argentina. Along their length, the Andes are split into several ranges, separated by intermediate depressions. The Andes are the location of several high plateaus—some of which host major cities such as Quito, Bogotá, Cali, Arequipa, Medellín, Bucaramanga, Sucre, Mérida, El Alto and La Paz. The Altiplano plateau is the world's second-highest after the Tibetan plateau. These ranges are in turn grouped into three major divisions based on climate: the Tropical Andes, the Dry Andes, and the Wet Andes. The Andes Mountains are the highest m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nape
The nape is the back of the neck. In technical anatomical/medical terminology, the nape is also called the nucha (from the Medieval Latin rendering of the Arabic , "spinal marrow"). The corresponding adjective is ''nuchal'', as in the term ''nuchal rigidity'' for neck stiffness. In many mammals the nape bears a loose, non-sensitive area of skin, known as the scruff, by which a mother carries her young by her teeth, temporarily immobilizing it during transport. In the mating of cats the male will grip the female's scruff with his teeth to help immobilize her during the act, a form of pinch-induced behavioral inhibition Pinch-induced behavioural inhibition (PIBI), also called dorsal immobility, transport immobility or clipnosis, is a partially inert state which results from a gentle squeeze of the skin behind the neck. It is mostly observed among cats and allows .... Cultural connotations In traditional Japanese culture, the was one of the few areas of the body (other than ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lewis' Woodpecker
Lewis's woodpecker (''Melanerpes lewis'') is a large North American species of woodpecker which ornithologist Alexander Wilson named after Meriwether Lewis, one of the explorers who surveyed the areas bought by the United States of America as part of the Louisiana Purchase and discovered this species of bird. Taxonomy Lewis's woodpecker was described and illustrated in 1811 by the American ornithologist Alexander Wilson in his ''American Ornithology; or, the Natural History of the Birds of the United States''. Wilson based his description on some bird skins that had been collected on an expedition across the western portion of the United States led by Meriwether Lewis and William Clark in 1803–1806. Wilson coined the English name "Lewis's woodpecker" and the binomial name ''Picus torquatus''. Unfortunately, the specific epithet was preoccupied by the ringed woodpecker, ''Celeus torquatus'' ( Boddaert, 1783) and so in 1849 the English zoologist George Robert Gray coined a n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jamaican Woodpecker
The Jamaican woodpecker (''Melanerpes radiolatus'') is a species of bird in subfamily Picinae of the woodpecker family Picidae. It is endemic to Jamaica. Taxonomy and systematics The Jamaican woodpecker has sometimes been placed in genus ''Centurus''. It is monotypic. Description The Jamaican woodpecker is about long and weighs . The sexes' plumage is alike except for their head pattern. Adult males have a whitish to buff forehead and are red from their forecrown to hindneck. Adult females have the same white to buffy white forehead but a gray crown with red only on the hindcrown and hindneck. Their upperparts are black with thin white bars that sometimes have a greenish tinge. The bars are widest on the rump and uppertail coverts. Their flight feathers are black with narrow white bars throughout. Their tail is black with some white bars on the central pair of feathers and white spots on the outermost pair. Their lores are yellowish and their cheeks, chin, and throat are wh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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