The Druidism script and reactions from the Masterwork Gnome mod, separated and portable for anyone else who wants to make a nature-loving race.

Be nice to your animals and you will be able to recruit them from the wild or release them, speak with birds to learn about who or what is approaching your fortress, train any animal in hunting and war, cause enemy warbeasts to defect to your side, train your pets in unarmed combat, command them to remain together as a group, and equip them with armor. You can also give them nicknames and read their thoughts. But be warned, if you abuse these privileges then you will lose them.

You can also make the Cage-O-Matic, a device that lets you shoot cages to humanely trap enemies.

The Druidism.lua script must be running for these reactions to work.

0.1: Release
0.2: Animal pet ownership can now be manipulated. Training animals to follow other animals now makes them each other's pets, so you can see who is following who in the animals screen. You can also dismiss pets from their owners.
0.3: Fixed a bug in animal healing.
0.4: Removes animals from pastures when releasing them.