WildSpawn

How the species appears wild in CREATURES mode, shaped like a vanilla mob's entry in a biome's spawn list: a weight against the other species that may spawn at the same spot, a group size, where the group may stand, and the light, world, environment, biome and height it needs. Empty lists allow everything. time and cap only hold back the top-up spawns around players: cap is how many of this species may be wild around one player, and new chunks are stocked whatever the time.