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
The Language of the Birds The Language of the Birds The Language of the Birds is a Russian fairy tale. A merchant's son, Ivan, wanted to learn the language of the birds. One day while hunting, he saw four chicks about to be swamped by a storm, and sheltered them with his kaftan. When the mother bird returned, she, in gratitude, taught him the language of the birds. He sat with his parents one night and was distressed by the nightingale's song. His father insisted on hearing what it said, and he told them that it had said he would be a king's son rather