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Pigeon Racing
Pigeon racing is the sport of releasing specialized, trained homing pigeons, which then return to their homes over a carefully measured distance. The time it takes the animal to cover the specified distance is measured and the bird's rate of travel is calculated and compared with all of the other pigeons in the race to determine which animal returned at the highest speed. Pigeon racing requires a specific breed of pigeon bred for the sport, the Racing Homer. Competing pigeons are specially trained and conditioned for races that vary in distance from approximately to . Despite these lengths, races can be won and lost by seconds, so many different timing and measuring devices have been developed. The traditional timing method involves rubber rings being placed into a specially designed clock, whereas a newer development uses RFID tags to record arrival time. While there is no definite proof, there are compelling reasons to think the sport of racing pigeons may go back at least ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hazards
A hazard is a potential source of harm. Substances, events, or circumstances can constitute hazards when their nature would potentially allow them to cause damage to health, life, property, or any other interest of value. The probability of that harm being realized in a specific ''incident'', combined with the magnitude of potential harm, make up its risk. This term is often used synonymously in colloquial speech. Hazards can be classified in several ways which are not mutually exclusive. They can be classified by ''causing actor'' (for example, natural or anthropogenic), by ''physical nature'' (e.g. biological or chemical) or by ''type of damage'' (e.g., health hazard or environmental hazard). Examples of natural disasters with highly harmful impacts on a society are floods, droughts, earthquakes, tropical cyclones, lightning strikes, volcanic activity and wildfires. Technological and anthropogenic hazards include, for example, structural collapses, transport accidents, acciden ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mating
In biology, mating is the pairing of either opposite-sex or hermaphroditic organisms for the purposes of sexual reproduction. ''Fertilization'' is the fusion of two gametes. '' Copulation'' is the union of the sex organs of two sexually reproducing animals for insemination and subsequent internal fertilization. Mating may also lead to external fertilization, as seen in amphibians, fishes and plants. For most species, mating is between two individuals of opposite sexes. However, for some hermaphroditic species, copulation is not required because the parent organism is capable of self-fertilization (autogamy); for example, banana slugs. The term ''mating'' is also applied to related processes in bacteria, archaea and viruses. Mating in these cases involves the pairing of individuals, accompanied by the pairing of their homologous chromosomes and then exchange of genomic information leading to formation of recombinant progeny (see mating systems). Animals For animals ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nestbox
A nest box, also spelled nestbox, is a man-made enclosure provided for animals to nest in. Nest boxes are most frequently utilized for birds, in which case they are also called birdhouses or a birdbox/bird box, but some mammals such as bats may also use them. Placing nestboxes or roosting boxes may also be used to help maintain populations of particular species in an area. Nest boxes were used since Roman times to capture birds for meat. The use of nest boxes for other purposes began in the mid-18th century, and naturalist August von Berlepsch was the first to produce nest boxes on a commercial scale. Nest boxes are getting more attention because increasing industrialization, urban growth, modern construction methods, deforestation and other human activities since the mid-20th century have caused severe declines in birds' natural habitats, introducing hurdles to breeding. Nest boxes can help prevent bird extinction, as it was shown in the case of scarlet macaws in the Peruvi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pigeon Keeping
Pigeon keeping or pigeon fancying is the art and Animal husbandry, science of breeding domestic pigeons. People have practiced pigeon keeping for at least 5,000 years and in almost every part of the world. In that time, humans have substantially altered the Morphology (biology), morphology and the behaviour of the domestication, domesticated descendants of the rock dove to suit their needs for food, aesthetics, aesthetic satisfaction and entertainment. People who breeder, breed pigeons are commonly referred to as pigeon Animal fancy, fanciers.Wendell (1977) 1 The hobby is gaining in popularity in the United States, after having waned within the last 50 years. Both the hobby and commercial aspects of keeping pigeons are thriving in other parts of the world. Types of pigeons kept The rock dove, the wild ancestor of domestic pigeons, was domesticated at least five thousand years ago, when it is first mentioned in historical records from Mesopotamia. There are hundreds of breeds of d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dovecote
A dovecote or dovecot , doocot (Scots Language, Scots) or columbarium is a structure intended to house Domestic pigeon, pigeons or doves. Dovecotes may be free-standing structures in a variety of shapes, or built into the end of a house or barn. They generally contain pigeonholes for the birds to nest. Pigeons and doves were an important food source historically in the Middle East and Europe and were kept for their eggs and dung. History and geography The oldest dovecotes are thought to have been the fortress-like dovecotes of Upper Egypt and the domed dovecotes of Iran. In these regions the droppings were used by farmers for fertilization. Pigeon droppings were also used for leather tanning and making gunpowder. In some cultures, particularly Medieval Europe, the possession of a dovecote was a symbol of status and power and was consequently regulated by law. Only nobles had this special privilege, known as ''droit de colombier''. Many ancient Manorialism, manors in Franc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prize Money
Prize money refers in particular to naval prize money, usually arising in naval warfare, but also in other circumstances. It was a monetary reward paid in accordance with the prize law of a belligerent state to the crew of a ship belonging to the state, either a warship of its navy or a privateer vessel commissioned by the state. Prize money was most frequently awarded for the capture of enemy ships or of cargoes belonging to an enemy in time of war, either arrested in port at the outbreak of war or captured during the war in international waters or other waters not the territorial waters of a neutral state. Goods carried in neutral ships that are classed as contraband, being shipped to enemy-controlled territory and liable to be useful to it for making war, were also liable to be taken as prizes, but non-contraband goods belonging to neutrals were not. Claims for the award of prize money were usually heard in a prize court, which had to adjudicate the claim and condemn the pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bloodline
Heredity, also called inheritance or biological inheritance, is the passing on of traits from parents to their offspring; either through asexual reproduction or sexual reproduction, the offspring cells or organisms acquire the genetic information of their parents. Through heredity, variations between individuals can accumulate and cause species to evolve by natural selection. The study of heredity in biology is genetics. Overview In humans, eye color is an example of an inherited characteristic: an individual might inherit the "brown-eye trait" from one of the parents. Inherited traits are controlled by genes and the complete set of genes within an organism's genome is called its genotype. The complete set of observable traits of the structure and behavior of an organism is called its phenotype. These traits arise from the interaction of the organism's genotype with the environment. As a result, many aspects of an organism's phenotype are not inherited. For example, s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Penygraig
Penygraig is a village and community in the Rhondda Valley in the county borough of Rhondda Cynon Taf, Wales. As a community Penygraig contains the neighbouring districts of Dinas, Edmondstown, Penrhiwfer and Williamstown. Penygraig is within the historic county boundaries of Glamorgan. The name Penygraig is Welsh for 'head of the rock'. Early history The original settlement which is now Penygraig was called Ffrwd Amos, though as with the rest of the Rhondda before industrialisation the only settlements were farmsteads. In 1832, Soar, one of the first baptist chapels in the Rhondda was built at Penygraig by preacher David Williams. Industrial Penygraig Coal mining began in Penygraig in 1857 when Thomas Ellis sank a drift mine. In 1858 Moses Rowlands and Richard Jenkins discovered a seam at Penygraig and would later form the Penygraig Coal Company. The Company sank the first deep pit in the village, The Penygraig Colliery; after which the village would be named. After the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transponder Timing
In telecommunications, a transponder is a device that, upon receiving a signal, emits a different signal in response. The term is a blend of ''transmitter'' and ''responder''. In air navigation or radio frequency identification, a flight transponder is an automated transceiver in an aircraft that emits a coded identifying signal in response to an interrogating received signal. In a communications satellite, a satellite transponder receives signals over a range of uplink frequencies, usually from a satellite ground station; the transponder amplifies them, and re-transmits them on a different set of downlink frequencies to receivers on Earth, often without changing the content of the received signal or signals. Satellite/broadcast communications A communications satellite’s channels are called transponders because each is a separate transceiver or repeater. With digital video data compression and multiplexing, several video and audio channels may travel through a single tra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antenna (radio)
In radio-frequency engineering, an antenna (American English) or aerial (British English) is an electronic device that converts an alternating current, alternating electric current into radio waves (transmitting), or radio waves into an electric current (receiving). It is the interface between radio waves Radio propagation, propagating through space and electric currents moving in metal Electrical conductor, conductors, used with a transmitter or receiver (radio), receiver. In transmission (telecommunications), transmission, a radio transmitter supplies an electric current to the antenna's Terminal (electronics), terminals, and the antenna radiates the energy from the current as electromagnetic radiation, electromagnetic waves (radio waves). In receiver (radio), reception, an antenna intercepts some of the power of a radio wave in order to produce an electric current at its terminals, that is applied to a receiver to be amplifier, amplified. Antennas are essential components ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pigeon Intelligence
Pigeons have featured in numerous experiments in comparative psychology, including experiments concerned with animal cognition, and as a result there is considerable knowledge of pigeon intelligence. Available data show, for example, that: *Pigeons have the capacity to share attention between different dimensions of a stimulus, but (like humans and other animals) their performance with multiple dimensions is worse than with a single stimulus dimension. *Pigeons can be taught relatively complex actions and response sequences, and can learn to make responses in different sequences. *Pigeons readily learn to respond in the presence of one simple stimulus and withhold responding in the presence of a different stimulus, or to make different responses in the presence of different stimuli. *Pigeons can discriminate between other individual pigeons, and can use the behaviour of another individual as a cue to tell them what response to make. *Pigeons readily learn to make discriminative re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
