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 Battle of the Birds The silver pigeon ate them, and the golden pigeon taxed him with what the giant's daughter had done for the prince. At that the prince knew her, and married her a second time. The Battle of the Birds The Battle of the Birds is a Scottish fairy tale collected by John Francis Campbell in his "Popular Tales of the West Highlands". He recorded it from a fisherman near Inverary, John Mackenzie. Joseph Jacobs took it from there for his "Celtic Fairy Tales" and added some additional elements. Also included in "The Lilac Fairy Book" by Andrew Lang and "A Book