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Gnateater
The gnateaters are a bird family, Conopophagidae, consisting of ten small passerine species in two genera, which occur in South and Central America. The family was formerly restricted to the gnateater genus ''Conopophaga''; analysis of mtDNA cytochrome ''b'' and NADH dehydrogenase subunit 2 sequences (Rice 2005a,b) indicates that the "antpittas" of the genus ''Pittasoma'' also belong in this family. The association between this genus and ''Conopophaga'' is also supported by traits in their natural history, morphology, and vocalizations (Rice, 2005a). The members of this family are very closely related to the antbirds and less closely to the antpittas and tapaculos. Due to their remote and dim habitat, gnateaters are a little-studied and poorly known family of birds, though they are often sought after by birdwatchers. Description They are round, short-tailed, and long-legged birds, about 12–19 cm (5–7½ inches) in length, with ''Pittasoma'' being larger than ''Conopop ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Conopophaga
''Conopophaga'' is a genus of birds in the gnateater family. Its members are found in forest and woodland in South America. Taxonomy and species list The genus ''Conopophaga'' was introduced in 1816 by the French ornithologist Louis Jean Pierre Vieillot. The name combines the Ancient Greek ''kōnōps'' meaning "gnat" with ''-phagos'' meaning "-eating". The type species was subsequently designated as the chestnut-belted gnateater by George Robert Gray in 1840. Peters incorrectly gives the page in Gray 1840 as 41. The genus now contains nine species, all with "gnateater" in their common names. Distribution and habitat Gnateaters are birds found in the undergrowth of forest, woodland, and bamboo stands, with most species in the Amazon Basin, the Atlantic Forest, and the East Andean slopes. All are associated with dense thickets. While they are always found near the ground, seldom rising more than 1.5 m up, they also seldom travel or spend much time on the ground itself (though ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Conopophaga Melanops - Black-cheeked Gnateater (male); Restinga De Bertioga State Park, São Paulo, Brazil
''Conopophaga'' is a genus of birds in the gnateater family. Its members are found in forest and woodland in South America. Taxonomy and species list The genus ''Conopophaga'' was introduced in 1816 by the French ornithologist Louis Jean Pierre Vieillot. The name combines the Ancient Greek ''kōnōps'' meaning "gnat" with ''-phagos'' meaning "-eating". The type species was subsequently designated as the chestnut-belted gnateater by George Robert Gray in 1840. Peters incorrectly gives the page in Gray 1840 as 41. The genus now contains nine species, all with "gnateater" in their common names. Distribution and habitat Gnateaters are birds found in the undergrowth of forest, woodland, and bamboo stands, with most species in the Amazon Basin, the Atlantic Forest, and the East Andean slopes. All are associated with dense thickets. While they are always found near the ground, seldom rising more than 1.5 m up, they also seldom travel or spend much time on the ground itself (though ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chestnut-crowned Gnateater
The chestnut-crowned gnateater (''Conopophaga castaneiceps'') is a species of bird in the family Conopophagidae. It is found in Colombia, Ecuador, and Peru. Taxonomy and systematics The position of the chestnut-crowned gnateater in linear format is unsettled. The International Ornithological Committee (IOC) and the Clements taxonomy place it differently within the gnateater family.Clements, J. F., T. S. Schulenberg, M. J. Iliff, S. M. Billerman, T. A. Fredericks, B. L. Sullivan, and C. L. Wood. 2019. The eBird/Clements Checklist of Birds of the World: v2019. Downloaded from https://www.birds.cornell.edu/clementschecklist/download/ Retrieved August 15, 2019 Four subspecies are recognized, though birds on the western slope of Colombia's Central Andes might be an unnamed taxonWhitney, B. (2020). Chestnut-crowned Gnateater (''Conopophaga castaneiceps''), version 1.0. In Birds of the World (J. del Hoyo, A. Elliott, J. Sargatal, D. A. Christie, and E. de Juana, Editors). Cornell Lab ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pittasoma
''Pittasoma'' is a genus of birds in the gnateater family. Its two members breed in subtropical or tropical moist forest in South and Central America, specifically the Chocó, and Panama and Costa Rica. Formerly placed in the family Formicariidae, they were reclassified to Conopophagidae following analysis of mtDNA cytochrome ''b'' and NADH dehydrogenase subunit 2 sequences (Rice, 2005a,b). The association between the genus ''Pittasoma'' and the 'traditional' gnateaters is also supported by traits in their natural history, morphology, vocalizations (Rice, 2005a). They are round, short-tailed, and long-legged birds, 16–19 cm (6-7½ inches) in length, making them the largest members of the gnateater family. These terrestrial birds are quite upright when standing. Sexes differ in plumage, but sexual dichromatism is less pronounced than in most members of the other gnateater genus, '' Conopophaga''. They are insectivorous. Species References *Rice, Nathan H. (2005a): Phy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Protein Subunit
In structural biology, a protein subunit is a polypeptide chain or single protein molecule that assembles (or "''coassembles''") with others to form a protein complex. Large assemblies of proteins such as viruses often use a small number of types of protein subunits as building blocks. A subunit is often named with a Greek or Roman letter, and the numbers of this type of subunit in a protein is indicated by a subscript. For example, ATP synthase has a type of subunit called α. Three of these are present in the ATP synthase molecule, leading to the designation α3. Larger groups of subunits can also be specified, like α3β3-hexamer and c-ring. Naturally-occurring proteins that have a relatively small number of subunits are referred to as oligomeric.Quote: ''Oligomer molecule: A molecule of intermediate relative molecular mass, the structure of which essentially comprises a small plurality of units derived, actually or conceptually, from molecules of lower relative molecular ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Andean
The Andes, Andes Mountains or Andean Mountains (; ) are the List of mountain ranges#Mountain ranges by length, 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 18th parallel south, 18°S – 20th parallel south, 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 depression (geology), 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, Mérida, Mérida, El Alto and La Paz. The Altiplano, Altiplano plateau is the world's second-highest after the Tibetan plateau. These ranges are in turn grouped into three major di ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orinoco River
The Orinoco () is one of the longest rivers in South America at . Its drainage basin, sometimes known as the Orinoquia, covers , with 76.3 percent of it in Venezuela and the remainder in Colombia. It is the fourth largest river in the world by discharge volume of water. The Orinoco River and its tributaries are the major transportation system for eastern and interior Venezuela and the Llanos of Colombia. The environment and wildlife in the Orinoco's basin are extremely diverse. Etymology The river's name is derived from the Warao term for "a place to paddle", itself derived from the terms ''güiri'' (paddle) and ''noko'' (place) i.e. a navigable place. History The mouth of the Orinoco River at the Atlantic Ocean was documented by Christopher Columbus on 1 August 1498, during his third voyage. Its source at the Cerro Delgado–Chalbaud, in the Parima range, was not explored until 453 years later, in 1951. The source, near the Venezuelan–Brazilian border, at ab ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amazon Basin
The Amazon basin is the part of South America drained by the Amazon River and its tributaries. The Amazon drainage basin covers an area of about , or about 35.5 percent of the South American continent. It is located in the countries of Bolivia, Brazil, Colombia, Ecuador, Guyana, Peru, Suriname, and Venezuela. Most of the basin is covered by the Amazon rainforest, also known as Amazonia. With a area of dense tropical forest, this is the largest rainforest in the world. Geography The Amazon River begins in the Andes Mountains at the west of the basin with its main tributary the Marañón River and Apurimac River in Peru. The highest point in the watershed of the Amazon is the second biggest peak of Yerupajá at . With a length of about before it drains into the Atlantic Ocean, it is one of the two longest rivers in the world. A team of scientists has claimed that the Amazon is longer than the Nile, but debate about its exact length continues. The Amazon system ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bamboo
Bamboos are a diverse group of evergreen perennial flowering plants making up the subfamily Bambusoideae of the grass family Poaceae. Giant bamboos are the largest members of the grass family. The origin of the word "bamboo" is uncertain, but it probably comes from the Dutch or Portuguese language, which originally borrowed it from Malay or Kannada. In bamboo, as in other grasses, the internodal regions of the stem are usually hollow and the vascular bundles in the cross-section are scattered throughout the stem instead of in a cylindrical arrangement. The dicotyledonous woody xylem is also absent. The absence of secondary growth wood causes the stems of monocots, including the palms and large bamboos, to be columnar rather than tapering. Bamboos include some of the fastest-growing plants in the world, due to a unique rhizome-dependent system. Certain species of bamboo can grow within a 24-hour period, at a rate of almost an hour (equivalent to 1 mm every 90 seco ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sexually Dimorphic Sexual dimorphism is the condition where the sexes of the same animal and/or plant species exhibit different morphological characteristics, particularly characteristics not directly involved in reproduction. The condition occurs in most animals and some plants. Differences may include secondary sex characteristics, size, weight, colour, markings, or behavioural or cognitive traits. These differences may be subtle or exaggerated and may be subjected to sexual selection and natural selection. The opposite of dimorphism is ''monomorphism'', which is when both biological sexes are phenotypically indistinguishable from each other. Overview Ornamentation and coloration Common and easily identified types of dimorphism consist of ornamentation and coloration, though not always apparent. A difference in coloration of sexes within a given species is called sexual dichromatism, which is commonly seen in many species of birds and reptiles. Sexual selection leads to the exaggerated d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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