after you build a prison you can start to learn things that can help catch some things. for example you can learn to catch reptiles from the witch in the swamp she will sell you what you need but you can later learn in your self. they want you to use more then one to have a better chance but I saves mid battle and keeps reloading until I catch them. the reptile one also works on rapters so you can get an awesome mount the only thing I cant figure out is how to put the mounts back in your stable to let them rest. they seem to be stuck following me around.