Chicken

chickenshenchickhensdomestic chickenGallus gallus domesticuspulletchicksGallus gallusGallus domesticus
The chicken (Gallus gallus domesticus) is a type of domesticated fowl, a subspecies of the red junglefowl (Gallus gallus).wikipedia
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Chicken as food

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Humans keep chickens primarily as a source of food (consuming both their meat and eggs) and, less commonly, as pets.
Chicken is the most common type of poultry in the world.

List of domesticated animals

domestic animaldomestic animalsdomesticated animals
They are one of the most common and widespread domestic animals, with a total population of more than 19 billion as of 2011.

Red junglefowl

Gallus gallusred jungle fowlGallus gallus domesticus
The chicken (Gallus gallus domesticus) is a type of domesticated fowl, a subspecies of the red junglefowl (Gallus gallus).
They are the primary progenitor of the domestic chicken (Gallus gallus domesticus) (though genetic evidence strongly suggests some past hybridisation with the grey junglefowl, as well).

Egg as food

eggseggchicken egg
Humans keep chickens primarily as a source of food (consuming both their meat and eggs) and, less commonly, as pets.
The most commonly consumed eggs are chicken eggs.

Domestication

domesticateddomesticdomesticate
The chicken (Gallus gallus domesticus) is a type of domesticated fowl, a subspecies of the red junglefowl (Gallus gallus).
Among birds, the major domestic species today is the chicken, important for meat and eggs, though economically valuable poultry include the turkey, guineafowl and numerous other species.

Rooster

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In the UK and Ireland, adult male chickens over the age of one year are primarily known as cocks, whereas in the United States, Canada, Australia and New Zealand, they are more commonly called roosters.
A rooster, also known as a cockerel or cock, is a male gallinaceous bird, with cockerel being younger and rooster being an adult male chicken (Gallus gallus domesticus).

Fowl

GalloanseraeGalloanseresfowls
The chicken (Gallus gallus domesticus) is a type of domesticated fowl, a subspecies of the red junglefowl (Gallus gallus).
Many birds that are eaten by humans are fowl, including poultry such as chickens or turkeys, game birds such as pheasants or partridges, other wildfowl like guineafowl or peafowl, and waterfowl such as ducks or geese.

Sebright chicken

SebrightSebright BantamSebright (chicken)
However, in some breeds, such as the Sebright chicken, the rooster has only slightly pointed neck feathers, the same colour as the hen's.
The Sebright (IPA: ) is a British breed of bantam chicken.

Comb (anatomy)

combcockscombcombs
The identification can be made by looking at the comb, or eventually from the development of spurs on the male's legs (in a few breeds and in certain hybrids, the male and female chicks may be differentiated by colour).
A comb is a fleshy growth or crest on the top of the head of gallinaceous birds, such as turkeys, pheasants, and domestic chickens.

Galliformes

game birdgamebirdgalliform
Galliformes, the class of bird that chickens belong to, is directly linked to the survival of birds when all other dinosaurs went extinct.
Galliformes is an order of heavy-bodied ground-feeding birds that includes turkey, grouse, chicken, New World quail and Old World quail, ptarmigan, partridge, pheasant, francolin, junglefowl and the Cracidae.

Grey junglefowl

grey jungle fowlGallus sonneratiiGrey junglefowl, Sonnerat's junglefowl (''Gallus sonneratii'') காட்டு கோழி
Recent genetic analysis has revealed that at least the gene for yellow skin was incorporated into domestic birds through hybridization with the grey junglefowl (''G.
The grey junglefowl (Gallus sonneratii), also known as Sonnerat's junglefowl, is one of the wild ancestors of domestic fowl together with the red junglefowl and other junglefowls.

Cochin chicken

CochinCochinskōchin
However, other breeds, such as the Cochin, Cornish and Silkie, do regularly go broody, and they make excellent mothers, not only for chicken eggs but also for those of other species—even those with much smaller or larger eggs and different incubation periods, such as quail, pheasants, turkeys or geese.
The Cochin is a breed of large domestic chicken.

Cornish chicken

CornishIndian GameDark Cornishes
However, other breeds, such as the Cochin, Cornish and Silkie, do regularly go broody, and they make excellent mothers, not only for chicken eggs but also for those of other species—even those with much smaller or larger eggs and different incubation periods, such as quail, pheasants, turkeys or geese.
The Cornish or Indian Game is a breed of chicken from the county of Cornwall in England.

Cockfight

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Originally raised for cockfighting or for special ceremonies, chickens were not kept for food until the Hellenistic period (4th–2nd centuries BC).
Male and female chickens of such a breed are referred to as game fowl.

Pecking order

dominant otherslow henpeck orders
Individual chickens in a flock will dominate others, establishing a "pecking order", with dominant individuals having priority for food access and nesting locations.
The original use of pecking order referred to the expression of dominance in chickens.

Araucana

chickenAraucana chickensBlue egg chicken
An unusual variety of chicken that has its origins in South America is the araucana, bred in southern Chile by the Mapuche people.
The Araucana (Gallina Mapuche) is a breed of domestic chicken from Chile.

Broiler

broiler chickenbroilersbroiler chickens
Chickens farmed for meat are called broilers.
A broiler is any chicken (Gallus gallus domesticus) that is bred and raised specifically for meat production.

List of chicken breeds

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Some hen breeds can produce over 300 eggs per year, with "the highest authenticated rate of egg laying being 371 eggs in 364 days".
There are hundreds of chicken breeds in existence.

Battery cage

battery cagesbattery hensbattery farming
Hens, particularly from battery cage systems, are sometimes infirm or have lost a significant amount of their feathers, and their life expectancy has been reduced from around seven years to less than two years.
Battery cages are a housing system used for various animal production methods, but primarily for egg-laying hens.

Broodiness

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Hens are then said to "go broody".
With domestication, it has become more profitable to incubate eggs artificially, while keeping hens in full egg production.

Silkie

Silkie chickenChinaJapanese silkie chicken
However, other breeds, such as the Cochin, Cornish and Silkie, do regularly go broody, and they make excellent mothers, not only for chicken eggs but also for those of other species—even those with much smaller or larger eggs and different incubation periods, such as quail, pheasants, turkeys or geese.
The Silkie (sometimes spelled Silky) is a breed of chicken named for its atypically fluffy plumage, which is said to feel like silk and satin.

Wattle (anatomy)

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Adult chickens have a fleshy crest on their heads called a comb, or cockscomb, and hanging flaps of skin either side under their beaks called wattles.

Egg incubation

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They have a communal approach to the incubation of eggs and raising of young.

Pet

petscompanion animalscompanion animal
Humans keep chickens primarily as a source of food (consuming both their meat and eggs) and, less commonly, as pets.

Forced molting

force moultforce moultedForced moulting
In some other countries, flocks are sometimes force moulted, rather than being slaughtered, to re-invigorate egg-laying.
Forced molting simulates the natural process where chickens grow a new set of feathers in the Autumn, a process generally accompanied by a sharp reduction or cessation of egg production.