RACE

Various monsters belong to various races. For example:

  llama and rabbits are of the same race because they are
    herbivores (cows, horses, etc).
  dragons are of the same race.
  orcs, gnolls, ogres, giants are all 'giant class' race.
  lycanthropes.
  predators (animals that hunt for food)
  undead
  snakes
  reptiles
  insects
  spiders
  demons
  devils
  humans, elves, etc...