Are the humanoid beasts that don't have a shape shift ability (Minotaurs for example). Not all were created equally though. Where a minotaur is gifted in strength and hearing, their eyesight is poor. Where harpies are fast and impeccable in the air, they are weak and less intelligent. These are just a couple faults and bonuses that come with the territory.

 

Their differences will depend on the beastkin variation.