Domesticated species of bird / From Wikipedia, the free encyclopedia

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The chicken (Gallus gallus domesticus) is a domesticated junglefowl species, with attributes of wild species such as the grey and the Ceylon junglefowl[1] that are originally from Southeast Asia. Rooster and cock are terms for adult male birds, and a younger male may be called a cockerel. A male that has been castrated is a capon. An adult female bird is called a hen, and a sexually immature female is called a pullet. Humans keep chickens primarily as a source of food (consuming both their meat and eggs) or as pets. Traditionally they were also bred for cockfighting, which is still practiced in some places. Chickens domesticated for meat are broilers and for eggs are layers.

Quick facts: Chicken, Conservation status, Scientific clas...
A rooster (left) and hen (right) perching on a roost
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Galliformes
Family: Phasianidae
Genus: Gallus
G. g. domesticus
Trinomial name
Gallus gallus domesticus
Chicken distribution

Chickens are one of the most common and widespread domestic animals, with a total population of 23.7 billion as of 2018,[2] up from more than 19 billion in 2011. There are more chickens in the world than any other bird. There are numerous cultural references to chickens—in myth, folklore and religion, and in language and literature.

Genetic studies have pointed to multiple maternal origin theories of within South Asia, Southeast Asia, and East Asia,[3] but the clade found in the Americas, Europe, the Middle East and Africa originated from the Indian subcontinent. From ancient India, the chicken spread to the Eastern Mediterranean. They appear in ancient Egypt in the mid-15th century BC, with the "bird that gives birth every day" having come from the land between Syria and Shinar, Babylonia, according to the annals of Thutmose III.[4][5][6] They are known in ancient Greece from the 5th century BC.[7][8]