Old World deer refers to a group of deer species that are native to Europe, Asia, and North Africa. The two most common species of Old World deer are the ROE deer (Capreolus capreolus) and the red deer (Cervus elaphus). The ROE deer is a small species of deer that is found in woodlands and meadows across Europe and parts of Asia. The ROE deer is also known as the roebuck or ROE, and its scientific name is Capreolus capreolus. The red deer is a large species of deer that is found in woodlands and meadows across Europe, Asia, and North Africa. The red deer is also known as the red stag or red ROE, and its scientific name is Cervus elaphus.