Chickens were domesticated over 10,000 years ago in Southeast Asia from jungle fowl. They are one of the most common domesticated animals in the world with over 24 billion worldwide. The modern day chicken is descended mainly from the red jungle fowl. There are differing scientific reports about where the chicken was first domesticated. Originally it was thought to have been domesticated in India, China, or Thailand but recent evidence suggests that chickens may
have first been domesticated in Vietnam. Chickens spread from Southeast Asia to West Asia by 3500 BC. Archaeologists have found
evidence of chicken bones in Egyptian tombs during the 18th dynasty which dates them to around 1400 BC. Chickens then spread to Europe through Greece by 500 BC. There is also controversy regarding when domesticated chickens first reached the Americas with evidence suggesting them being brought through the Polynesian Islands to Chile around 1350 AD, and other evidence suggesting that they were brought by the Spanish Conquistadors. Most modern day breeds come from England, America, and the Mediterranean.