The other way is to visit this wiki and search up the specific types of animals or creatures from the mob page. These mobs are the most common next to the birds. If you want to know what all the names are for some mobs, you can check on the World editor screen where you can mouseover the few mobs listed. Info: This cheat spawns in the preferred amount of mobs you want, but some of them have a different name, such as the Treeguard being called the leif because in the coding of the game treeguard is mentioned as leif.
To go back to a previous cheat, press the up arrow and change it to your liking or the correct way. if the screen does not add any text, you put it in correctly, if the screen adds text, then you have to put it in again correctly.to exit the screen at any time, press the ~ key once again. A window as on the right should appear where you can input the code EXACTLY as you see it.
To access each cheat window, press the ' key (Or ~ key if on American keyboard) .