Biomes and mobs

I think the new skeletons are very cool, but I need more types for specific biomes: cold, warm, temperate. Also water or flowers for biomes with lots of flowers (colored trees), and here is a scale with this thing and I have no idea about cave spiders ________________________ _________| warm|cold|water|flower| Zombie | is |not | is | not | ~~~~~~|~~~~|~~~|~~~|~~~~~| Skeleton | not | is | is |not | ~~~~~~|~~~~|~~~|~~~|~~~~~| Spider |not |not |not | not | ~~~~~~|~~~~|~~~~|~~|~~~~~| Creeper |not |not |not|not | ~~~~~~|~~~~|~~~~|~~|~~~~~| I think the skeletons are very cool, but I need more types for specific biomes: cold, warm, temperate. Also water or flowers for biomes with lots of flowers (colored trees), and here is a scale with this thing and I have no idea about cave spiders ________________________ _________| warm|cold|water|flower| Zombie | is |not | is | not | ~~~~~~|~~~~|~~~|~~~|~~~~~| Skeleton | not | is | is |not | ~~~~~~|~~~~|~~~|~~~|~~~~~| Spider |not |not |not | not | ~~~~~~|~~~~|~~~~|~~|~~~~~| Creeper |not |not |not|not | ~~~~~~|~~~~|~~~~|~~|~~~~~|