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Sebright (chicken)
The Sebright (IPA: ) is a British breed of bantam chicken. It is a true bantam – a miniature bird with no corresponding large version – and is one of the oldest recorded British bantam breeds. It is named after Sir John Saunders Sebright, who created it as an ornamental breed by selective breeding in the early nineteenth century.Hobson, Jeremy and Lewis, Cecilia. ''Choosing & Raising Chickens: The complete guide to breeds and welfare''. David and Charles publishing. London. 2009. p 85. The first poultry breed to have its own specialist club for enthusiasts, Sebrights were admitted to poultry exhibition standards not long after their establishment. Today, they are among the most popular of bantam breeds. Despite their popularity, Sebrights are often difficult to breed, and the inheritance of certain unique characteristics the breed carries has been studied scientifically. As a largely ornamental chicken, they lay tiny, white eggs and are not kept for meat production. H ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rare Breeds Survival Trust
The Rare Breeds Survival Trust is a conservation charity whose purpose is to secure the continued existence and viability of the native farm animal genetic resources (FAnGR) of the United Kingdom. It was founded in 1973 by Joe Henson to preserve native breeds; since then, no UK-native breed has become extinct. It maintains a watch list of rare native breeds of cattle, sheep, pigs, horses, goats and poultry,Rare Breeds Survival Trust watch list accessed June 2016 and an approved list of farm parks.Rare Breeds Survival Trust approved farm parks accessed February 2012 Projects have included the collection of genetic material ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silver Sebright Hen
Silver is a chemical element with the symbol Ag (from the Latin ', derived from the Proto-Indo-European ''h₂erǵ'': "shiny" or "white") and atomic number 47. A soft, white, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal. The metal is found in the Earth's crust in the pure, free elemental form ("native silver"), as an alloy with gold and other metals, and in minerals such as argentite and chlorargyrite. Most silver is produced as a byproduct of copper, gold, lead, and zinc refining. Silver has long been valued as a precious metal. Silver metal is used in many bullion coins, sometimes alongside gold: while it is more abundant than gold, it is much less abundant as a native metal. Its purity is typically measured on a per-mille basis; a 94%-pure alloy is described as "0.940 fine". As one of the seven metals of antiquity, silver has had an enduring role in most human cultures. Other than i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pit Game
The Old English Game is a British breed of domestic chicken. It was probably originally bred for cockfighting. Two different standards are recognised by the Poultry Club of Great Britain: Carlisle Old English Game and Oxford Old English Game. There is also an Old English Game bantam. Characteristics The Old English Game has many colour variants. Twenty-eight are recognised by the American Poultry Association, while the Entente Européenne d’Aviculture et de Cuniculture Entente, meaning a diplomatic "understanding", may refer to a number of agreements: History * Entente (alliance), a type of treaty or military alliance where the signatories promise to consult each other or to cooperate with each other in case o ... lists thirty-three. In Britain, thirteen colours are recognised for the Carlisle type, and thirty for the Oxford type. Use Since the abolition of cock-fighting in 1849, the Old English Game has been kept primarily for show. Old English Game hens may l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hen-feathered
Hen feathering in cocks is the occurrence of a genetically conditioned character in domestic fowl (''Gallus gallus domesticus''). Males with this condition develop a female-type plumage, although otherwise look and respond as virile males. Hen-feathering in cocks is one of the typical characteristics of the Sebright Bantam, a breed established circa 1810, in accordance with the intentions of its creator, Sir John Saunders Sebright. Sexual dimorphism in plumage is very common in birds, particularly within Phasianidae where males are bigger and have brighter and more colorful plumage than females among other morphological differences. Cocks with hen-feathering Males of most chicken breeds distinguish from their females in having longer, sharp and more scalloped feathers in neck, hackle, saddle and wing bows. But in some breeds, like the fancy breeds Sebright and Campine and some game breeds like Pettai Madhirione can see males that have a plumage completely similar in all asp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hamburg (chicken)
The Hamburg, nl, Hollands hoen, italic=no, german: Hamburger, italic=no, is a breed of chicken which is thought to have originated in Holland (in some sources, Hamburg, Germany) sometime prior to the fourteenth century. The name may be spelled Hamburgh in the United Kingdom and in Australia. Characteristics The Hamburg is a small or medium-sized breed. Cocks weigh and hens about , with slender legs and a neat rose comb. Ring size is for cocks and for hens. Eleven different colour varieties are recognised in Germany and Holland, including silver-spangled, gold-spangled, gold-pencilled, citron-pencilled, silver-pencilled, white, black and citron-spangled; six of these are included in the American standard of perfection. Pencilled breeds are smallest and self-coloured birds are largest. There are also Bantam Hamburgs. Use Hamburgs mature quickly and are considered good egg producers. Eggs weigh about 50 g, with glossy, white shells. In literature Lalia Phipps Boone ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nankin (chicken)
The Nankin Bantam or Nankin is a British bantam breed of chicken. It is a true bantam, a naturally small breed with no large counterpart from which it was miniaturised. It is of South-east Asian origin, and is among the oldest bantam breeds. It is a yellowish buff colour, and the name is thought to derive from the colour of nankeen cotton from China. History The Nankin is thought to be one of the oldest true bantam breeds, originating somewhere in Southeast Asia. Though they first became widespread in the West only in the 18th century, there is evidence for their presence in England going back to the 16th century. As a bantam long present in the UK especially, the Nankin contributed to the formation of many other bantams more common today, such as the Sebright. Nankin are listed as 'Critical' on the endangered chicken breeds list of the Livestock Conservancy. They are very rarely found in the USA. The number of Nankins declined in the West after the mid 19th century, along ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cross-breeding
A crossbreed is an organism with purebred parents of two different breeds, varieties, or populations. ''Crossbreeding'', sometimes called "designer crossbreeding", is the process of breeding such an organism, While crossbreeding is used to maintain health and viability of organisms, irresponsible crossbreeding can also produce organisms of inferior quality or dilute a purebred gene pool to the point of extinction of a given breed of organism. A domestic animal of unknown ancestry, where the breed status of only one parent or grandparent is known, may also be called a crossbreed though the term "mixed breed" is technically more accurate. Outcrossing is a type of crossbreeding used within a purebred breed to increase the genetic diversity within the breed, particularly when there is a need to avoid inbreeding. In animal breeding, ''crossbreeds'' are crosses within a single species, while '' hybrids'' are crosses between different species. In plant breeding terminology, the term ' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polish (chicken)
The Polish or Poland is a European breed of crested chickens known for its remarkable crest of feathers. The oldest accounts of these birds come from The Netherlands; their exact origins are unknown, however. In addition to combs, they are adorned with large crests that nearly cover the entirety of the head. This crest limits their vision, and as a result can affect their temperament. Thus, though normally tame, they may be timid and easily frightened. My Pet Chicken, accessed March 19, 2011. Polish chickens are bred primarily as a show bird, but were originally productive egg layers. Accordingly, Polish rarely go broody and are noted for their white eggs. There are bearded, non-bearded and [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Descent Of Man, And Selection In Relation To Sex
''The Descent of Man, and Selection in Relation to Sex'' is a book by English naturalist Charles Darwin, first published in 1871, which applies evolutionary theory to human evolution, and details his theory of sexual selection, a form of biological adaptation distinct from, yet interconnected with, natural selection. The book discusses many related issues, including evolutionary psychology, evolutionary ethics, evolutionary musicology, differences between human races, differences between sexes, the dominant role of women in mate choice, and the relevance of the evolutionary theory to society. Publication As Darwin wrote, he posted chapters to his daughter Henrietta for editing to ensure that damaging inferences could not be drawn, and also took advice from his wife Emma. Many of the figures were drawn by the zoological illustrator T. W. Wood, who had also illustrated Wallace's ''The Malay Archipelago'' (1869). The corrected proofs were sent off on 15 January 1871 to the pu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
On The Origin Of Species
''On the Origin of Species'' (or, more completely, ''On the Origin of Species by Means of Natural Selection, or the Preservation of Favoured Races in the Struggle for Life''),The book's full original title was ''On the Origin of Species by Means of Natural Selection, or the Preservation of Favoured Races in the Struggle for Life''. In the 1872 sixth edition, "On" was omitted, so the full title is ''The origin of species by means of natural selection, or the preservation of favoured races in the struggle for life.'' This edition is usually known as ''The Origin of Species.'' The 6th is Darwin's final edition; there were minor modifications in the text of certain subsequent issues. See Freeman, R. B. In Van Wyhe, John, ed. ''Darwin Online: On the Origin of Species'', 2002. published on 24 November 1859, is a work of scientific literature by Charles Darwin that is considered to be the foundation of evolutionary biology. Darwin's book introduced the scientific theory that populatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Natural Selection
Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, the change in the heritable traits characteristic of a population over generations. Charles Darwin popularised the term "natural selection", contrasting it with selective breeding, artificial selection, which in his view is intentional, whereas natural selection is not. Genetic diversity, Variation exists within all populations of organisms. This occurs partly because random mutations arise in the genome of an individual organism, and their offspring can inherit such mutations. Throughout the lives of the individuals, their genomes interact with their environments to cause variations in traits. The environment of a genome includes the molecular biology in the Cell (biology), cell, other cells, other individuals, populations, species, as well as the abiotic environment. Because individuals with certain variants of the trait tend ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Animal Observations
Animals are multicellular, eukaryotic organisms in the biological kingdom Animalia. With few exceptions, animals consume organic material, breathe oxygen, are able to move, can reproduce sexually, and go through an ontogenetic stage in which their body consists of a hollow sphere of cells, the blastula, during embryonic development. Over 1.5 million living animal species have been described—of which around 1 million are insects—but it has been estimated there are over 7 million animal species in total. Animals range in length from to . They have complex interactions with each other and their environments, forming intricate food webs. The scientific study of animals is known as zoology. Most living animal species are in Bilateria, a clade whose members have a bilaterally symmetric body plan. The Bilateria include the protostomes, containing animals such as nematodes, arthropods, flatworms, annelids and molluscs, and the deuterostomes, containing the echinoderms and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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