The chicken production has had an important development during the last years and it is very diffused in our country, mainly in temperate and warm climates, due to its high profitability, good acceptance in the market, easiness to find good lines and concentrated foods of excellent quality that provide very good results in nutritious conversion. The origin of the corral birds is located in the southeast of Asia. The British naturalist Charles Darwin considered them descending of an only wild species, the rooster bankiva that lives in wild state from India to Philippines going by the Asian Southeast. They are granívoros and ovovivíparos, their big and heavy body, as well as their short wings disable most of the varieties for the flight, except at short distances. In the adults of the two sexes the head is adorned with some outgrowths to both sides of the pick and a naked and fleshy crest that it is more prominent in the male and he/she has diverse forms in function of the different lines....La producción de pollo ha tenido un desarrollo importante durante los últimos años y está muy difundida en nuestro país, sobre todo en climas templados y cálidos, debido a su alta rentabilidad, buena aceptación en el mercado, facilidad para encontrar buenas líneas y alimentos concentrados de excelente calidad que proporcionan muy buenos resultados en conversión alimenticia. El origen de las aves de corral se sitúa en el sureste de Asia. El naturalista británico Charles Darwin las consideró descendientes de una única especie silvestre, el gallo bankiva, que vive en estado salvaje desde India hasta Filipinas pasando por el Sureste asiático.