Yeah - just like when looking at encounter tables, you have the common, uncommon, rare, and very rare encounters... for example, for a cold wilderness forest, we have:
Common: brown bear, giant centipede, mammoth, orc, wolf, etc.
Uncommon: bandit, white dragon, wood elf, kobold, owl, giant rat, stirge, troll, etc.
Rare: northern bear, mountain dwarf, hill dwarf, goblin, giant lynx, giant scorpion, shadow, treant, dire wolf, worg, etc.
Very Rare: giant bat, gold dragon, gargoyle, ghost, fire giant, frost giant, gnome, greenhag, phoenix, ice troll, vampire, winter wolf, zombie, etc.
Lots of animals, to be sure! Some humanoids and demihumans rolled in as well, though (gotta make a better bandit one of these days). Exotic beasties are around, but are quite rare in general; more can be found in the depths of a dungeon
