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Ocreatus
The booted racket-tails are a small group of hummingbirds in the genus ''Ocreatus'' that was long considered to have only one species, ''O. underwoodii''. They are native to cloud forest edges in the South American Andes and Maritime Andes. They are relatively small (even compared to most other hummingbirds) and primarily iridescent green with white or rufous-buff leg-puffs ("boots"). The leg-puffs are more conspicuous in males, which also have a pair of dark bluish racket-shaped extensions to the tail. Taxonomy The genus ''Ocreatus'' was described by John Gould in 1846. During the 19th century, several populations were described as different species, but since the mid-20th century authorities generally only recognized a single widespread species, ''O. underwoodii'', with several subspecies. Research published in 2016, however, argued that three subspecies groups, ''addae'', ''annae'' and ''peruanus'', that are mostly allopatric (only ''peruanus'' and ''underwoodii'' have ranges ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peruvian Racket-tail (f) JCB
The Peruvian racket-tail (''Ocreatus peruanus'') is a species of hummingbird in the "brilliants", tribe Heliantheini in subfamily Lesbiinae. It is found in Ecuador and Peru.HBW and BirdLife International (2020) ''Handbook of the Birds of the World and BirdLife International digital checklist of the birds of the world'' Version 5. Available at: http://datazone.birdlife.org/userfiles/file/Species/Taxonomy/HBW-BirdLife_Checklist_v5_Dec20.zip xls zipped 1 MBretrieved 27 May 2021 Taxonomy and systematics The Peruvian racket-tail, as defined by the International Ornithological Committee (IOC) and the Clements taxonomy, is one of three species in genus ''Ocreatus''. However, BirdLife International's Handbook of the Birds of the World (HBW) treats the taxon as one of eight subspecies of booted racket-tail (''O. underwoodii''). The IOC and Clements call ''underwoodii'' "white-booted racket-tail" and assign five subspecies to it.Clements, J. F., T. S. Schulenberg, M. J. Iliff, T. A. Fr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peruvian Racket-tail
The Peruvian racket-tail (''Ocreatus peruanus'') is a species of hummingbird in the "brilliants", tribe Heliantheini in subfamily Lesbiinae. It is found in Ecuador and Peru.HBW and BirdLife International (2020) ''Handbook of the Birds of the World and BirdLife International digital checklist of the birds of the world'' Version 5. Available at: http://datazone.birdlife.org/userfiles/file/Species/Taxonomy/HBW-BirdLife_Checklist_v5_Dec20.zip xls zipped 1 MBretrieved 27 May 2021 Taxonomy and systematics The Peruvian racket-tail, as defined by the International Ornithological Committee (IOC) and the Clements taxonomy, is one of three species in genus ''Ocreatus''. However, BirdLife International's Handbook of the Birds of the World (HBW) treats the taxon as one of eight subspecies of booted racket-tail (''O. underwoodii''). The IOC and Clements call ''underwoodii'' "white-booted racket-tail" and assign five subspecies to it.Clements, J. F., T. S. Schulenberg, M. J. Iliff, T. A. Fr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ocreatus
The booted racket-tails are a small group of hummingbirds in the genus ''Ocreatus'' that was long considered to have only one species, ''O. underwoodii''. They are native to cloud forest edges in the South American Andes and Maritime Andes. They are relatively small (even compared to most other hummingbirds) and primarily iridescent green with white or rufous-buff leg-puffs ("boots"). The leg-puffs are more conspicuous in males, which also have a pair of dark bluish racket-shaped extensions to the tail. Taxonomy The genus ''Ocreatus'' was described by John Gould in 1846. During the 19th century, several populations were described as different species, but since the mid-20th century authorities generally only recognized a single widespread species, ''O. underwoodii'', with several subspecies. Research published in 2016, however, argued that three subspecies groups, ''addae'', ''annae'' and ''peruanus'', that are mostly allopatric (only ''peruanus'' and ''underwoodii'' have ranges ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rufous-booted Racket-tail
The rufous-booted racket-tail (''Ocreatus addae'') is a species of hummingbird in the "brilliants", tribe Heliantheini in subfamily Lesbiinae. It is found in Bolivia and Peru.HBW and BirdLife International (2020) ''Handbook of the Birds of the World and BirdLife International digital checklist of the birds of the world'' Version 5. Available at: http://datazone.birdlife.org/userfiles/file/Species/Taxonomy/HBW-BirdLife_Checklist_v5_Dec20.zip xls zipped 1 MBretrieved 27 May 2021 Taxonomy and systematics The rufous-booted racket-tail, as defined by the International Ornithological Committee (IOC) and the Clements taxonomy, is one of three species in genus ''Ocreatus''. However, BirdLife International's Handbook of the Birds of the World (HBW) treats the taxon as one of eight subspecies of booted racket-tail (''O. underwoodii''). The IOC and Clements call ''underwoodii'' "white-booted racket-tail" and assign five subspecies to it. HBW splits the Peruvian population from ''O. under ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ocreatus Addae (Rufous-booted Racket-tail), Paucartambo, Peru
The rufous-booted racket-tail (''Ocreatus addae'') is a species of hummingbird in the "brilliants", tribe Heliantheini in subfamily Lesbiinae. It is found in Bolivia and Peru.HBW and BirdLife International (2020) ''Handbook of the Birds of the World and BirdLife International digital checklist of the birds of the world'' Version 5. Available at: http://datazone.birdlife.org/userfiles/file/Species/Taxonomy/HBW-BirdLife_Checklist_v5_Dec20.zip xls zipped 1 MBretrieved 27 May 2021 Taxonomy and systematics The rufous-booted racket-tail, as defined by the International Ornithological Committee (IOC) and the Clements taxonomy, is one of three species in genus ''Ocreatus''. However, BirdLife International's Handbook of the Birds of the World (HBW) treats the taxon as one of eight subspecies of booted racket-tail (''O. underwoodii''). The IOC and Clements call ''underwoodii'' "white-booted racket-tail" and assign five subspecies to it. HBW splits the Peruvian population from ''O. under ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
White-booted Racket-tail
The white-booted racket-tail (''Ocreatus underwoodii'') is a species of hummingbird in the "brilliants", tribe Heliantheini in subfamily Lesbiinae. It is found in Colombia, Ecuador, and Venezuela.HBW and BirdLife International (2020) ''Handbook of the Birds of the World and BirdLife International digital checklist of the birds of the world'' Version 5. Available at: http://datazone.birdlife.org/userfiles/file/Species/Taxonomy/HBW-BirdLife_Checklist_v5_Dec20.zip [.xls zipped 1 MB] retrieved 27 May 2021 Taxonomy and systematics The white-booted racket-tail, as defined by the International Ornithological Committee (IOC) and the Clements taxonomy, has five subspecies. They both include two more species in genus ''Ocreatus'', the Peruvian racket-tail (''O. peruanus'') and the Rufous-booted racket-tail (''O. addae''). However, BirdLife International's Handbook of the Birds of the World (HBW) assigns the name "booted racket-tail" to ''O. underwoodii'' and includes those two taxa as su ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
White-booted Racket-tail
The white-booted racket-tail (''Ocreatus underwoodii'') is a species of hummingbird in the "brilliants", tribe Heliantheini in subfamily Lesbiinae. It is found in Colombia, Ecuador, and Venezuela.HBW and BirdLife International (2020) ''Handbook of the Birds of the World and BirdLife International digital checklist of the birds of the world'' Version 5. Available at: http://datazone.birdlife.org/userfiles/file/Species/Taxonomy/HBW-BirdLife_Checklist_v5_Dec20.zip [.xls zipped 1 MB] retrieved 27 May 2021 Taxonomy and systematics The white-booted racket-tail, as defined by the International Ornithological Committee (IOC) and the Clements taxonomy, has five subspecies. They both include two more species in genus ''Ocreatus'', the Peruvian racket-tail (''O. peruanus'') and the Rufous-booted racket-tail (''O. addae''). However, BirdLife International's Handbook of the Birds of the World (HBW) assigns the name "booted racket-tail" to ''O. underwoodii'' and includes those two taxa as su ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maritime Andes
The Venezuelan Coastal Range ( es, Cordillera de la Costa or ), also known as Venezuelan Caribbean Mountain System ( es, Sistema Montañoso Caribe) is a mountain range system and one of the eight natural regions of Venezuela, that runs along the central and eastern portions of Venezuela's northern coast. The range is a northeastern extension of the Andes, and is also known as the Maritime Andes. It covers around 48,866 km2, being the 4th largest natural region in Venezuela. Geography The Coastal Range actually consists of two parallel ranges, which run east and west along the coast of the Caribbean Sea. The Cojedes River separates the western end of Coastal Range from the Cordillera de Mérida to the southeast. The range is divided into eastern and western sections by the wide bay between Cape Codera and Cumaná. Serranía del Litoral—Serranía del Interior In eastern section of the range, the parallel ranges are known as the Serranía del Litoral, which runs along the Caribbe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Racket (sports Equipment)
A racket, or racquet, is a sports implement used for striking a ball or shuttlecock in games such as squash, tennis, racquetball, badminton and padel. In the strictest sense a racket consists of a handled frame with an open hoop across which a network of strings is stretched tightly. Some rackets may have a solid or perforated hitting surface instead of a network of strings. Such rackets may be called a paddle or bat. Collectively, these games are known as racket sports. Racket design, materials and manufacturing has changed considerably over the centuries. The frame of rackets for all sports was traditionally made of solid wood (later laminated wood) and the strings of animal intestine known as catgut. The traditional racket size was limited by the strength and weight of the wooden frame which had to be strong enough to hold the strings and stiff enough to hit the ball or shuttle. Manufacturers started adding non-wood laminates to wood rackets to improve stiffness. Non-wood rack ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subspecies
In biological classification, subspecies is a rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics (morphology), but that can successfully interbreed. Not all species have subspecies, but for those that do there must be at least two. Subspecies is abbreviated subsp. or ssp. and the singular and plural forms are the same ("the subspecies is" or "the subspecies are"). In zoology, under the International Code of Zoological Nomenclature, the subspecies is the only taxonomic rank below that of species that can receive a name. In botany and mycology, under the International Code of Nomenclature for algae, fungi, and plants, other infraspecific ranks, such as variety, may be named. In bacteriology and virology, under standard bacterial nomenclature and virus nomenclature, there are recommendations but not strict requirements for recognizing other important infraspecific ranks. A taxonomist decides whether ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Allopatric
Allopatric speciation () – also referred to as geographic speciation, vicariant speciation, or its earlier name the dumbbell model – is a mode of speciation that occurs when biological populations become geographically isolated from each other to an extent that prevents or interferes with gene flow. Various geographic changes can arise such as the movement of continents, and the formation of mountains, islands, bodies of water, or glaciers. Human activity such as agriculture or developments can also change the distribution of species populations. These factors can substantially alter a region's geography, resulting in the separation of a species population into isolated subpopulations. The vicariant populations then undergo genetic changes as they become subjected to different selective pressures, experience genetic drift, and accumulate different mutations in the separated populations' gene pools. The barriers prevent the exchange of genetic information between t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Gould
John Gould (; 14 September 1804 – 3 February 1881) was an English ornithologist. He published a number of monographs on birds, illustrated by plates produced by his wife, Elizabeth Gould, and several other artists, including Edward Lear, Henry Constantine Richter, Joseph Wolf and William Matthew Hart. He has been considered the father of bird study in Australia and the Gould League in Australia is named after him. His identification of the birds now nicknamed "Darwin's finches" played a role in the inception of Darwin's theory of evolution by natural selection. Gould's work is referenced in Charles Darwin's book, ''On the Origin of Species''. Early life Gould was born in Lyme Regis, the first son of a gardener. Both father and son probably had little education. After working on Dowager Lady Poulett's glass house, his father obtained a position on an estate near Guildford, Surrey, and then in 1818, Gould Snr became foreman in the Royal Gardens of Windsor. Gould then be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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