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Guianan Schiffornis
The Guianan schiffornis or olivaceous schiffornis (''Schiffornis olivacea''), is a species of Neotropical bird. Distribution and habitat It is found from southeast Venezuela to Guyana and north central Brazil. Its natural habitats are subtropical or tropical moist lowland forests and subtropical or tropical moist montane forests. Description It is medium-sized, about 24 cm (9 in.) long. Taxonomy The Guianan schiffornis has traditionally been placed in the manakin family, but evidence strongly suggest it is better placed in Tityridae, where now placed by SACC. The species was split by the AOU in 2013 from the species complex thrush-like schiffornis Thrush-like schiffornis is a species complex that has been split into five species: * Brown-winged schiffornis, ''Schiffornis turdina'' * Russet-winged schiffornis, ''Schiffornis stenorhyncha'' * Foothill schiffornis, ''Schiffornis aenea'' * Nor ....Nyári, Á. S. 2007. ''Phylogeographic patterns, molecular and voc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Robert Ridgway
Robert Ridgway (July 2, 1850 – March 25, 1929) was an American ornithologist specializing in systematics. He was appointed in 1880 by Spencer Fullerton Baird, secretary of the Smithsonian Institution, to be the first full-time curator of birds at the United States National Museum, a title he held until his death. In 1883, he helped found the American Ornithologists' Union, where he served as officer and journal editor. Ridgway was an outstanding descriptive taxonomist, capping his life work with ''The Birds of North and Middle America'' (eight volumes, 1901–1919). In his lifetime, he was unmatched in the number of North American bird species that he described for science. As technical illustrator, Ridgway used his own paintings and outline drawings to complement his writing. He also published two books that systematized color names for describing birds, ''A Nomenclature of Colors for Naturalists'' (1886) and ''Color Standards and Color Nomenclature'' (1912). Ornitholo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Montane Forest
Montane ecosystems are found on the slopes of mountains. The alpine climate in these regions strongly affects the ecosystem because temperatures fall as elevation increases, causing the ecosystem to stratify. This stratification is a crucial factor in shaping plant community, biodiversity, metabolic processes and ecosystem dynamics for montane ecosystems. Dense montane forests are common at moderate elevations, due to moderate temperatures and high rainfall. At higher elevations, the climate is harsher, with lower temperatures and higher winds, preventing the growth of trees and causing the plant community to transition to montane grasslands, shrublands or alpine tundra. Due to the unique climate conditions of montane ecosystems, they contain increased numbers of endemic species. Montane ecosystems also exhibit variation in ecosystem services, which include carbon storage and water supply. Life zones As elevation increases, the climate becomes cooler, due to a decrease in a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Birds Of The Guianas
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. Bir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Schiffornis
''Schiffornis'' is a genus of bird in the family Tityridae. It has traditionally been placed in the manakin family, but evidence strongly suggest it is better placed in Tityridae, - South American Classification Committee (2007) where now placed by SACC. Instead of schiffornis, they are sometimes referred to as mourners; a name shared with members of the genera '' Laniocera
''Laniocera'' is a genus of passerine birds in the family Tityridae. It has traditionally been placed in the cotinga family, but evidence strongly suggest it is ...
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Thrush-like Schiffornis
Thrush-like schiffornis is a species complex that has been split into five species: * Brown-winged schiffornis, ''Schiffornis turdina'' * Russet-winged schiffornis, ''Schiffornis stenorhyncha'' * Foothill schiffornis, ''Schiffornis aenea'' * Northern schiffornis, ''Schiffornis veraepacis'' * Guianan schiffornis, ''Schiffornis olivacea'' Each of these species was split from the species complex by the American Ornithologists' Union The American Ornithological Society (AOS) is an ornithological organization based in the United States. The society was formed in October 2016 by the merger of the American Ornithologists' Union (AOU) and the Cooper Ornithological Society. Its m ... in 2013.Nyári, Á. S. 2007. "Phylogeographic patterns, molecular and vocal differentiation, and species limits in ''Schiffornis turdina'' (Aves)". ''Molecular Phylogenetics and Evolution'' 44: 154–164 References {{Animal common name Birds by common name ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species Complex
In biology, a species complex is a group of closely related organisms that are so similar in appearance and other features that the boundaries between them are often unclear. The taxa in the complex may be able to hybridize readily with each other, further blurring any distinctions. Terms that are sometimes used synonymously but have more precise meanings are cryptic species for two or more species hidden under one species name, sibling species for two (or more) species that are each other's closest relative, and species flock for a group of closely related species that live in the same habitat. As informal taxonomic ranks, species group, species aggregate, macrospecies, and superspecies are also in use. Two or more taxa that were once considered conspecific (of the same species) may later be subdivided into infraspecific taxa (taxa within a species, such as bacterial strains or plant varieties), that is complex but it is not a species complex. A species complex is in most cas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South American Classification Committee
The American Ornithological Society (AOS) is an ornithological organization based in the United States. The society was formed in October 2016 by the merger of the American Ornithologists' Union (AOU) and the Cooper Ornithological Society. Its members are primarily professional ornithologists, although membership is open to anyone with an interest in birds. The society publishes the two scholarly journals, ''The Auk'' and '' The Condor'' as well as the ''AOS Checklist of North American Birds''. In 2013, the American Ornithologists' Union announced a close partnership with the Cooper Ornithological Society, including joint meetings, a centralized publishing office, and a refocusing of their respective journals to increase efficiency of research. In October 2016, the AOU announced that it was ceasing to operate as an independent union and was merging with the Cooper Ornithological Society to create the American Ornithological Society. History The American Ornithologists' Unio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tityridae
Tityridae is family of suboscine passerine birds found in forest and woodland in the Neotropics. The 45 species in this family were formerly spread over the families Tyrannidae, Pipridae and Cotingidae (''see Taxonomy''). As yet, no widely accepted common name exists for the family, although tityras and allies and tityras, mourners and allies have been used. They are small to medium-sized birds. Under current classification, the family ranges in size from the buff-throated purpletuft, at and , to the masked tityra, at up to and . Most have relatively short tails and large heads. Taxonomy and systematics The family Tityridae (as the subfamily Tityrinae) containing the genera ''Tityra'' and ''Pachyramphus'' was introduced by the English zoologist George Robert Gray in 1840. Traditionally, the genus ''Laniocera'' was included in the family Tyrannidae, the genera ''Iodopleura'', '' Laniisoma'', '' Tityra'', ''Pachyramphus'' and '' Xenopsaris'' were included in the family Coting ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Manakin
The manakins are a Family (biology), family, Pipridae, of small Tyranni, suboscine passerine birds. The group contains some 54 species distributed through the American tropics. The name is from Middle Dutch ''mannekijn'' "little man" (also the source of the different bird name ''Munia, mannikin''). Description Manakins range in size from and in weight from . Species in the genus ''Tyranneutes'' are the smallest manakins, those in the genus ''Antilophia'' are believed to be the largest (since the genus ''Schiffornis'' are no longer considered manakins). They are compact stubby birds with short tails, broad and rounded wings, and big heads. The beak, bill is short and has a wide gap. Females and first-year males have dull green plumage; most species are sexual dimorphism, sexually dichromatic in their plumage, the males being mostly black with striking colours in patches, and in some species having long, decorative tail or crown feathers or erectile throat feathers. In some species ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tropics
The tropics are the regions of Earth surrounding the Equator. They are defined in latitude by the Tropic of Cancer in the Northern Hemisphere at N and the Tropic of Capricorn in the Southern Hemisphere at S. The tropics are also referred to as the tropical zone and the torrid zone (see geographical zone). In terms of climate, the tropics receive sunlight that is more direct than the rest of Earth and are generally hotter and wetter as they aren't affected as much by the solar seasons. The word "tropical" sometimes refers to this sort of climate in the zone rather than to the geographical zone itself. The tropical zone includes deserts and snow-capped mountains, which are not tropical in the climatic sense. The tropics are distinguished from the other climatic and biomatic regions of Earth, which are the middle latitudes and the polar regions on either side of the equatorial zone. The tropics constitute 40% of Earth's surface area and contain 36% of Earth's landmass. , the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neotropical
The Neotropical realm is one of the eight biogeographic realms constituting Earth's land surface. Physically, it includes the tropical terrestrial ecoregions of the Americas and the entire South American temperate zone. Definition In biogeography, the Neotropic or Neotropical realm is one of the eight terrestrial realms. This realm includes South America, Central America, the Caribbean islands, and southern North America. In Mexico, the Yucatán Peninsula and southern lowlands, and most of the east and west coastlines, including the southern tip of the Baja California Peninsula are Neotropical. In the United States southern Florida and coastal Central Florida are considered Neotropical. The realm also includes temperate southern South America. In contrast, the Neotropical Floristic Kingdom excludes southernmost South America, which instead is placed in the Antarctic kingdom. The Neotropic is delimited by similarities in fauna or flora. Its fauna and flora are distinct ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subtropics
The subtropical zones or subtropics are geographical and climate zones to the north and south of the tropics. Geographically part of the temperate zones of both hemispheres, they cover the middle latitudes from to approximately 35° north and south. The horse latitudes lie within this range. Subtropical climates are often characterized by hot summers and mild winters with infrequent frost. Most subtropical climates fall into two basic types: humid subtropical (Koppen climate Cfa), where rainfall is often concentrated in the warmest months, for example Southeast China and the Southeastern United States, and dry summer or Mediterranean climate (Koppen climate Csa/Csb), where seasonal rainfall is concentrated in the cooler months, such as the Mediterranean Basin or Southern California. Subtropical climates can also occur at high elevations within the tropics, such as in the southern end of the Mexican Plateau and in Da Lat of the Vietnamese Central Highlands. The six climate cl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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