Owlbear

Owlbears are notoriously bloodthirsty killers, well known for their short tempers, aggression, and savage nature. They tend to attack without provocation, slaughtering any living creatures that cross their paths. Many scholars that have encountered these creatures in the wild have noted that they all have red-rimmed eyes that roll about wildly when they close in for an attack. This is sometimes presented as a sign of madness, suggesting that all owlbears are born with a pathological need to fight and kill, but more level-headed researchers believe that it’s simply part of the way the massive bird-beast’s keen eyes are constructed.
Owlbears generally inhabit desolate areas of the wilderness, making their messy lairs within wild forests or inside dark, shallow caverns. They are equally adept at hunting during the day and at night, depending upon the prey available near their lairs.
Adult owlbears live in mated pairs, and hunt in small groups, leaving their young behind in their lairs while they search for prey. While it is considered impossible to truly domesticate owlbears due to their feral natures, they can still be used as guardians if contained within an area but allowed to roam and hunt freely there.