The donkey is a member of the horse family. Donkeys have worked together with humans for centuries, and they continue to fill important roles in many regions today. They vary in size from 0.9 to over 1.5 m tall, and have developed very loud vocalizations, which help keep in contact with other donkeys over the wide spaces. The best-known call is referred to a “bray”, which can be heard for over three kilometers. Donkeys have large ears and may pick up more distant sounds, and help cool their blood. Once a person has earned their confidence they can be willing and companionable partners and very dependable in work. For this reason, they are now commonly kept as pets in countries where their use as beasts of burden has disappeared.