I'm having fun playing dwarf fortress (Not that kind of fun. At least, not yet) in a Taiga / Arctic ocean biome, and I notice that every now and again, I get a pack of 2-3 walruses showing up on my map.
This generated a single happy thought: tame walruses. War Walruses, even. I looked up on the Dwarf Fortress wiki on how to capture live animals, and everything pointed to cage traps.
a) My Taiga / Tundra / Ocean map is heavy on the open spaces. Is there any trick to "baiting" my cage traps such that I can increase the likelyhood that a walrus stumbles into it?
b) if cage traps are the only way to capture a live animal, what does the "capture live land animal" task at the butcher's shop actually do?