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
Birds of the World: Recommended English Names some 80% of the world's species and is still sometimes controversial. A number of authors have come up with lists of birds of the world, but none had as its primary goal the standardization of names. As a result, the field of English names of birds was left "a swirling sea of polylexy and polysemy, where one bird may have many names and one name may apply to many birds." In the late 1980s, the International Ornithological Congress (IOC) sought to reach consensus in standardized vernacular names for commonly used languages. Standardized names were published for French in 1993 and