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Malaita Dwarf Kingfisher
The Malaita dwarf kingfisher (''Ceyx malaitae''), is a species of bird in the family Alcedinidae that is endemic to Malaita Island. Its natural habitat is subtropical or tropical moist lowland forests. This species was formerly considered as one of the 15 recognised subspecies of what was then known as the variable dwarf kingfisher (''Ceyx lepidus'' or ''Alcedo lepidus''). A molecular phylogenetic study published in 2013 found that most of the insular subspecies had substantially diverged from one another. The variable dwarf kingfisher was therefore split and 12 of the subspecies, including the Malaita dwarf kingfisher, were promoted to species status. At the same time the name of the variable dwarf kingfisher was changed to the Moluccan dwarf kingfisher. Clements has merged this species into the Guadalcanal dwarf kingfisher The Guadalcanal dwarf kingfisher (''Ceyx nigromaxilla''), is a species of bird in the family Alcedinidae that is endemic to Guadalcanal Island. Its natu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ernst Mayr
Ernst Walter Mayr (; 5 July 1904 – 3 February 2005) was one of the 20th century's leading evolutionary biologists. He was also a renowned taxonomist, tropical explorer, ornithologist, philosopher of biology, and historian of science. His work contributed to the conceptual revolution that led to the modern evolutionary synthesis of Mendelian genetics, systematics, and Darwinian evolution, and to the development of the biological species concept. Although Charles Darwin and others posited that multiple species could evolve from a single common ancestor, the mechanism by which this occurred was not understood, creating the ''species problem''. Ernst Mayr approached the problem with a new definition for species. In his book '' Systematics and the Origin of Species'' (1942) he wrote that a species is not just a group of morphologically similar individuals, but a group that can breed only among themselves, excluding all others. When populations within a species become isolated b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bird
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 swimm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Malaita Island
Malaita is the primary island of Malaita Province in Solomon Islands. Malaita is the most populous island of the Solomon Islands, with a population of 161,832 as of 2021, or more than a third of the entire national population. It is also the second largest island in the country by area, after Guadalcanal. A tropical and mountainous island, Malaita's river systems and tropical forests are being exploited for ecosystem stability by keeping them pristine. The largest city and provincial capital is Auki, on the northwest coast and is on the northern shore of the Langa Langa Lagoon. The people of the Langa Langa Lagoon and the Lau Lagoon on the northeast coast of Malaita call themselves ''wane i asi'' ‘salt-water people’ as distinct from ''wane i tolo'' ‘bush people’ who live in the interior of the island. South Malaita Island, also known as ''Small Malaita'' and ''Maramasike'' for Areare speakers and Malamweimwei known to more than 80% of the islanders, is the islan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Habitat
In ecology, the term habitat summarises the array of resources, physical and biotic factors that are present in an area, such as to support the survival and reproduction of a particular species. A species habitat can be seen as the physical manifestation of its ecological niche. Thus "habitat" is a species-specific term, fundamentally different from concepts such as environment or vegetation assemblages, for which the term "habitat-type" is more appropriate. The physical factors may include (for example): soil, moisture, range of temperature, and light intensity. Biotic factors will include the availability of food and the presence or absence of predators. Every species has particular habitat requirements, with habitat generalist species able to thrive in a wide array of environmental conditions while habitat specialist species requiring a very limited set of factors to survive. The habitat of a species is not necessarily found in a geographical area, it can be the interior ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Forest
A forest is an area of land dominated by trees. Hundreds of definitions of forest are used throughout the world, incorporating factors such as tree density, tree height, land use, legal standing, and ecological function. The United Nations' Food and Agriculture Organization (FAO) defines a forest as, "Land spanning more than 0.5 hectares with trees higher than 5 meters and a canopy cover of more than 10 percent, or trees able to reach these thresholds ''in situ''. It does not include land that is predominantly under agricultural or urban use." Using this definition, '' Global Forest Resources Assessment 2020'' (FRA 2020) found that forests covered , or approximately 31 percent of the world's land area in 2020. Forests are the predominant terrestrial ecosystem of Earth, and are found around the globe. More than half of the world's forests are found in only five countries (Brazil, Canada, China, Russia, and the United States). The largest share of forests (45 percent) are in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Variable Dwarf Kingfisher
Variable dwarf kingfisher is a common name of a group of kingfishers in the genus, '' Ceyx''. The variable dwarf kingfisher (''Ceyx lepidus'' or ''Alcedo lepidus'') formerly included 15 subspecies. A molecular phylogenetic study published in 2013 found that most of the insular subspecies had substantially diverged from one another. The variable dwarf kingfisher was therefore split and 12 of the subspecies were promoted to species status. At the same time the name of the variable dwarf kingfisher was changed to the Moluccan dwarf kingfisher. The species in the group are: * Moluccan dwarf kingfisher, ''Ceyx lepidus'' * Dimorphic dwarf kingfisher, ''Ceyx margarethae'' * Sula dwarf kingfisher, ''Ceyx wallacii'' * Buru dwarf kingfisher, ''Ceyx cajeli'' * Papuan dwarf kingfisher, ''Ceyx solitarius'' * Manus dwarf kingfisher, ''Ceyx dispar'' * New Ireland dwarf kingfisher, ''Ceyx mulcatus'' * New Britain dwarf kingfisher, ''Ceyx sacerdotis'' * North Solomons dwarf kingfisher ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Molecular Phylogenetic
Molecular phylogenetics () is the branch of phylogeny that analyzes genetic, hereditary molecular differences, predominantly in DNA sequences, to gain information on an organism's evolutionary relationships. From these analyses, it is possible to determine the processes by which diversity among species has been achieved. The result of a molecular phylogenetic analysis is expressed in a phylogenetic tree. Molecular phylogenetics is one aspect of molecular systematics, a broader term that also includes the use of molecular data in taxonomy and biogeography. Molecular phylogenetics and molecular evolution correlate. Molecular evolution is the process of selective changes (mutations) at a molecular level (genes, proteins, etc.) throughout various branches in the tree of life (evolution). Molecular phylogenetics makes inferences of the evolutionary relationships that arise due to molecular evolution and results in the construction of a phylogenetic tree. History The theoretical ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moluccan Dwarf Kingfisher
The Moluccan dwarf kingfisher (''Ceyx lepidus''), formerly known as the variable dwarf kingfisher, is a species of bird in the family Alcedinidae. Taxonomy This species was previous named the variable dwarf kingfisher and had 15 recognised subspecies. A molecular phylogenetic study published in 2013 found that most of the taxa had substantially diverged from each other. The species was therefore split and 12 of the subspecies were promoted to species status. At the same time the name was changed to the Moluccan dwarf kingfisher. Some taxonomic authorities further split this species into the Seram dwarf kingfisher, and refer to the other group as the North Moluccan dwarf kingfisher. The Seram dwarf kingfisher is then limited to the southern Moluccas. Distribution This species is endemic to the Moluccas. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Guadalcanal Dwarf Kingfisher
The Guadalcanal dwarf kingfisher (''Ceyx nigromaxilla''), is a species of bird in the family Alcedinidae that is endemic to Guadalcanal Island. Its natural habitat is sub-tropical or tropical moist lowland forests. This species was formerly considered one of the 15 recognised subspecies of what was then known as the variable dwarf kingfisher (''Ceyx lepidus'' or ''Alcedo lepidus''). A molecular phylogenetic study published in 2013 found that most of the insular subspecies had substantially diverged from one another. The variable dwarf kingfisher was therefore split and 12 of the subspecies, including the Guadalcanal dwarf kingfisher, were promoted to species status. At the same time the name of the variable dwarf kingfisher was changed to the Moluccan dwarf kingfisher The Moluccan dwarf kingfisher (''Ceyx lepidus''), formerly known as the variable dwarf kingfisher, is a species of bird in the family Alcedinidae. Taxonomy This species was previous named the variable dwarf kin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ceyx (bird)
''Ceyx'' is an Old World genus of river kingfishers. These kingfishers are found from South East Asia to the Solomon Islands. The genus was introduced by the French naturalist Bernard Germain de Lacépède in 1799, and derives its name from the Greek myth of Alcyone and Ceyx. The type species is the oriental dwarf kingfisher (''Ceyx erithaca''). A molecular phylogenetic study of the alcedinine kingfishers published in 2007 found that the genera as then defined did not form monophyletic groups. The species were subsequently rearranged into four monophyletic genera. The little kingfisher, azure kingfisher, Bismarck kingfisher, silvery kingfisher and Indigo-banded kingfisher were moved from ''Alcedo'' to ''Ceyx''. All except one of the birds in the reconstituted genus have three rather than the usual four toes. The exception is the Sulawesi dwarf kingfisher which retains a vestigial fourth toe. The Moluccan dwarf kingfisher (''Ceyx lepidus'') was previous named the vari ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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