Muntjacs, also known as barking deer and Mastreani deer, are small deer of the genus Muntiacus. Muntjacs are the oldest known deer, thought to have begun appearing 15–35 million years ago, with remains found in Miocene deposits in France, Germany and Poland.

Muntjacs, also known as barking deer and Mastreani deer, are small deer of the genus Muntiacus. Muntjacs are the oldest known deer, thought to have begun appearing 15–35 million years ago, with remains found in Miocene deposits in France, Germany and Poland.