Bodies are defined by objects living in body_zone. There are arranged in a number of trees, based on classification (evolutionary where appropriate).

Properties on bodies should be set as follows

id	body_%s, where %s is the short
treatas	set to the id of the body we inherit from. If not present, this is a root.
short	a short, one word name
name	a noun phrase - e.g. "a fish"
body.heal	Can this regenerate damage naturally? If not present, inherited
body.talk	Can this speak? If not present, inherited
body.breathe.air	Can this breathe air? If not present, inherited
body.breathe.water	Can this breathe water? If not present, inherited
body.move.fly	Can this fly? If not present, inherited
body.move.swim	Can this swim? If not present, inherited
body.move.walk	Can this move on dry land? If not present, inherited
body.plan.legs	Does this have legs? If not present, inherited
mog	set to 0 to disable mogs to this type
adj	the adjective for this type. will end up "%slike" if not set
speech	the speech to replace what people say when mogged. optional.
motion.verb	the verb to display when moving on land. If not present, inherited.