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 a Russian folk tale; it was made into a children's opera by composer John Kennedy. Language of the birds In mythology, medieval literature and occultism, the language of the birds is postulated as a mystical, perfect divine language, green language, adamic language, Enochian, angelic language or a mythical or magical language used by birds to communicate with the initiated. In Indo-European religion, the behavior of birds has long been used for the purposes of divination by augurs. According to a suggestion by Walter Burkert, these customs may have their roots in the Paleolithic when, during the Ice Age, early humans