The saddle is a item that allows you to tame neutral mobs. It allows you to ride a boar, baby dragons, king crabs and hawks if tamed. To tame a mob, hold the saddle and find one. Hit the mob with the saddle to attempt to tame it. If it works, the tamed mob appears in your inventory. If it does not work, it will become aggressive and attack you. To stop riding, you must be at a complete stop, and then click the icon of the pet in your inventory.
The Crown of Luck can enhance the chance of taming a mob, an example is a boar: 10% with nothing and 15% if wearing it.
You also can tame a hawk in midair, so there is less risk of it attacking you