• Most standard animals in the game are Beasts, such as bears, wolves, raptors, etc.
• These can be tracked through the hunter ability, Track Beasts.
• Many beasts, but only beasts, are tamable by the hunter ability, Tame Beast.

Critters  

• Critters are typically harmless and low level. They are intended for ambience and predator animals (cats, wolves, etc.) are scripted to attack them when critters get close, to give a more realistic feel to the game.

Demons 

• Hateful, twisted or otherwise inherently evil creatures who take pleasure in the suffering of others. Demons are the races which make up the majority of the Burning Legion.
• These can be tracked through the hunter ability, Track Demons, and the warlock ability, Sense Demons.
• Warlocks can summon some demons as minions, as well as enslave them for a time, but only the lesser ones.

Dragonkin 

• Anything dragon-based; range greatly in power from tiny whelps to massive dragonflight leaders.
• These can be tracked through the hunter ability, Track Dragonkin.

Elementals 

• Chaotic manifestations of the elements (fire, air, water, earth, arcane/mana, life) ranging in power from minor spirits to massive Princes, Aspects and Lords.
• These can be tracked through the hunter ability, Track Elementals.

Giants 

• Huge creatures, usually Elite. Usually humanoid in appearance (i.e. Mountain Giants, Sea Giants).
• These can be tracked through the hunter ability, Track Giants.

Humanoids 

• Includes all the playable races (including Forsaken), as well as Pandaren, ogres, and a variety of other intelligent or semi-intelligent living creatures that neither include nerubians, centaur, naga, nor dragonkin.
• These can be tracked through spells such as the hunter ability, Track Humanoids.
• Nearly all humanoids tend to runaway when they get low on health, usually pulling other mobs in the process.

Mechanicals 

• Moving devices created through a mix of expert engineering and magic.
• Usually associated with Goblins or Gnomes, although the Burning Legion has also been known to make use of mechanical creatures.

Undead 

• The term undead refers to all creatures or entities that function normally despite having terminated life functions, excluding the Forsaken.
• These can be tracked through the hunter ability, Track Undead, or the paladin ability Sense Undead.

Uncategorized creatures 

• Some creatures aren't classified as any of the above creature types. They have their own properties or differences and therefore can't be placed in a category. Examples include the Naaru, Oozes, Qiraji Prophets like Skeram, the grub worms of Eastern Plaguelands, and "God" type bosses such as Hakkar and C'thun.
• A few creatures are unclassified aberrations, such as the Bloodpetal lashers of Un'Goro: other lasher types found in Maraudon and Dire Maul are Elementals (Nature).