Animal genetic resources for food and agriculture of animal genetic resources includes diversity at species, breed and within-breed level. Known are currently 8,800 different breeds of birds and mammals within 38 species used for food and agriculture. The main animal species used for food and agriculture production are cattle, sheep, goats, chickens and pigs. In the livestock world, these species are often referred to as "the big five". Some less-utilized species include the dromedary, donkey, bactrian camel, buffalo, guinea pig, horse, rabbit, yak, goose, duck, ostrich,partridge, pheasant, pigeon, and turkey. The history of animal genetic resources begins about 12,000 to 14,000 years ago. The domestication of major
Ornamental animal captivity and have formed feral populations. A number of animals have been protected from local or worldwide extinction by being kept as ornamental animals. The following are breeds or species whose history has included a significant period as ornamental animals, either globally or in particular regions (animals kept primarily in modern zoos, aquaria or waterfowl collections are not included): Ornamental animal An ornamental animal is an animal kept for display or curiosity, often in a park. A wide range of mammals, birds and fish have been kept as ornamental animals. Ornamental animals have often formed the basis of introduced populations,