In ancient times, poultry generally referred to domestic animals such as chickens, ducks, geese, cattle, sheep and pigs, which were domesticated by humans and used for agricultural production and food supply. Wild animals refer to wild animals, such as lions, tigers, leopards, bears, wolves, foxes, deer and wild boars. They naturally grow in the wild and are regarded as prey or dangerous animals by human beings. In some cultures, poultry and wild animals also represent different symbolic meanings. For example, poultry represents peace and gentleness, while wild animals represent wildness, strength and danger.