Animal genetic resources for food and agriculture crop and livestock species in the early neolithic time period changed our human evolution and lifestyles. This ability to control food production led to major demographic, technological, political and military changes. Consecutively, thousands of years of natural and human selection, genetic drift, inbreeding, and crossbreeding have contributed to the diversification of animal genetic resources and increased the variety of environments and production systems that livestock keeping takes place. Relatively few species have been domesticated; out of the world's 148 non-carnivorous species weighing more than 45 kg, only 15 have been successfully domesticated. The proportion of domesticated birds used for food
Language of the birds and Amharic of Ethiopia. Ukrainian language is known as "nightingale speech" amongst its speakers. In Norse mythology, the power to understand the language of the birds was a sign of great wisdom. The god Odin had two ravens, called Hugin and Munin, who flew around the world and told Odin what happened among mortal men. The legendary king of Sweden Dag the Wise was so wise that he could understand what birds said. He had a tame house sparrow which flew around and brought back news to him. Once, a farmer in Reidgotaland killed Dag's sparrow, which brought on a