1. An African wild Ass, kiang, onager, or any of their subspecies

2. The Art of the Catapult: Build Greek Ballistae, Roman Onagers, English Trebuchets, and More Ancient Artillery

3. The Art of the Catapult: Build Greek Ballistae, Roman Onagers, English Trebuchets, and More Ancient Artillery [Gurstelle, William] on Amazon.com

4. In the Arctogaea realm, the cursorial radius is represented by dogs; hoofed runners or unguligrade by deer, antelope, ghorkhar (Equus onager) etc

5. Arbalest - an engine that provided medieval artillery used during sieges; a heavy war engine for hurling large stones and other missiles arbalist , ballista , bricole , mangonel , onager , trebuchet , trebucket , …

6. Traction trebuchet and Counterweight trebuchet are modern terms (), not used by contemporary users of the weapons.The term traction trebuchet was created mainly to distinguish this type of weapon from the onager, a torsion powered catapult which is often conflated in contemporary sources with the mangonel, which was used as a generic term for any medieval stone throwing artillery.